There were almost 700 thousand slaves in the U.S. in 1790, which equated to approximately 18 percent of the total population, or roughly one in six people. By 1860, the final census taken before the American Civil War, there were four million slaves in the South, compared with less than 500,000 free Black Americans in all of the U.S.. Of the 4.4 million Blacks in the U.S. before the war, almost four million of these people were held as slaves; meaning that for all African Americans living in the US in 1860, there was an 89 percent* chance that they lived in slavery. A brief history Trans-Atlantic slavery began in the early 16th century, when the Portuguese and Spanish forcefully brought enslaved Africans to the New World. The British Empire introduced slavery to North America on a large scale, and the economy of the British colonies there depended on slave labor, particularly regarding cotton, sugar, and tobacco output. In the seventeenth and eighteenth century the number of slaves being brought to the Americas increased exponentially, and at the time of American independence it was legal in all thirteen colonies. Although slavery became increasingly prohibited in the north, the number of slaves remained high during this time as they were simply relocated or sold from the north to the south. It is also important to remember that the children of slaves were also viewed as property, and were overwhelmingly born into a life of slavery. Abolition and the American Civil War In the years that followed independence, the Northern States gradually prohibited slavery, it was officially abolished there by 1805, and the importation of slave labor was prohibited nationwide from 1808 (although both still existed in practice after this). Business owners in the Southern States however depended on slave labor in order to meet the demand of their rapidly expanding industries, and the issue of slavery continued to polarize American society in the decades to come. This culminated in the election of President Abraham Lincoln in 1860, who promised to prohibit slavery in the newly acquired territories to the west, leading to the American Civil War from 1861 to 1865. Although the Confederacy (south) took the upper hand in much of the early stages of the war, the strength in numbers of the northern states including many free, Black men, eventually resulted in a victory for the Union (north), and the nationwide abolishment of slavery with the Thirteenth Amendment in 1865. Legacy In total, an estimated twelve to thirteen million Africans were transported to the Americas as slaves, and this does not include the high number who did not survive the journey (which was as high as 23 percent in some years). In the 150 years since the abolition of slavery in the US, the African-American community have continuously campaigned for equal rights and opportunities that were not afforded to them along with freedom. The most prominent themes have been the Civil Rights Movement, voter suppression, mass incarceration, and the relationship between the police and the African-American community.

This statistic shows the number of black men and women in the US from 1820 until 1880. Slavery was legal in the Southern States of the US until 1865, when the Thirteenth Amendment was added to the US Constitution after the American Civil War. Until that time all of the slaves included in this statistic were registered as living in the South, whereas the majority of the free, black men and women lived in the Northern States. From the data we can see that, while the slave experience was very different for men and women, there was relatively little difference between their numbers in each respective category. While female slaves were more likely to serve in domestic roles, they were also more likely to be working in the lowest and unskilled jobs on plantations, whereas men were given more skilled and physically demanding roles. As slavery was abolished in 1870, all black people from this point were considered free in the census data. It is also worth noticing that in these years the difference in the number of men and women increased, most likely as a result of all the black male soldiers who fell fighting in the American Civil War.

Between 1501 and 1866, it is estimated that over 12.5 million people were forced onto ships in Africa, and transported to the Americas as slaves. Furthermore, it is estimated that only 10.7 million of these slaves disembarked on the other side of the Atlantic, meaning that roughly 1.8 million did not survive the journey. The transatlantic slave trade was a part of the triangular trade route between Europe, Africa and the Americas, during the sixteenth and nineteenth centuries. Generally speaking, this route saw European merchants bring manufactured products to Africa to trade for slaves, then transport the slaves to the Americas to harvest raw materials, before taking these materials back to Europe where they would then be consumed or used in manufacturing. Slavery was an integral part in funding the expansion of Europe's colonial empires, which shaped the modern and highly globalized world in which we live today.

The Middle Passage As with trade, the slave journey was also broken into three parts; the First Passage was the stage where slaves were captured and transported to African ports, the Middle Passage was the journey across the Atlantic, while the Final Passage was where the slaves were transported to their place of work. The death toll in the First Passage is thought to be the highest of the three stages, as millions were killed or fatally wounded as they were captured, however a lack of written data and historical evidence has made this number difficult to estimate. In contrast, shipping records from the time give a much more accurate picture of the Middle Passage's death toll, and this data suggest that roughly 14.5 percent of slaves did not survive the journey. The reason for this was the harsh and cramped conditions on board; slave ships were designed in such a way that they could fit the maximum number of slaves on board in order to maximize profits. These conditions then facilitated the spread of diseases, such as smallpox and dysentery, while malnutrition and thirst created further problems. Generally, slavers aimed to keep slaves as healthy (therefore; profitable) as possible, although there are countless examples of mistreatment and punishment of slaves by their captors, and several cases where slaves were exterminated by the crew as provisions ran low.

Rise and fall of the transatlantic slave trade

The European arrival in the Americas also saw the introduction of virgin soil epidemics (new diseases being introduced to biologically defenseless populations) which decimated the indigenous populations. The abundance of natural resources, but lack of available labor led to the rise of the transatlantic slave trade. Until the mid-1600s, Portuguese traders had a near-monopoly on this trade, supplying slaves to the newly expanding Spanish and Portuguese empires in South America. As other European powers began to expand their empires in the Caribbean and North America, the slave trade grew dramatically, and during the eighteenth century, the number of slaves being brought to the New World increased from an annual average of thirty thousand in the 1690s to 87 thousand in the 1790s. The transatlantic slave trade reached its peak between the 1750 and 1850, and an average of 74 thousand slaves were brought to the Americas each year between these dates. The largest decline came as the slave trade was disrupted during the American War of Independence (1775-1783), although the trade became weakened as the abolitionist movement gained momentum in Europe and the Americas around the turn of the century. The most significant impacts came as the slave trade was abolished in Britain and the U.S. in 1807 and Brazil in 1831, and Britain then used its position as the global superpower to impose abolition on other nations and used the Royal Navy to enforce these measures. While most nations abolished the slave trade in the early 1800s, it would take decades before the actual practice of slavery would be abolished; today, slavery is illegal in almost every country, however modern slavery in the forms of forced labor, human trafficking and sexual exploitation continues to be prevalent across the globe.

The "Enslaved People in the African American National Biography, 1508-1865" dataset builds on the complete print and online collection of the African American National Biography (AANB), edited by Henry Louis Gates, Jr. and Evelyn Brooks Higginbotham. The full collection contains over 6,000 biographical entries of named historical individuals, including 1,304 for subjects born before 1865 and the abolition of slavery in the United States. In making a subset of biographical entries from the multivolume work, the goal was to extract life details from those biographies into an easy-to-view database form that details whether a subject was enslaved for some or all of their lives and to provide the main biographical details of each subject for contextual analysis and comparison. 52 fields covering location data; gender; names, alternate names and suffixes; dates and places of birth and death; and up to 8 occupations were included. We also added 13 unique fields that provide biographical details on each subject: Free born in North America; Free before 13th Amendment; Ever Enslaved; How was freedom attained; Other/uncertain status; African born; Parent information; Runaways and rebels; Education/literacy; Religion; Slave narrative or memoir author; Notes; and Images.

This study uses historical records from 36 archives in the United States to analyze 8,437 enslaved people's sale and/or appraisal prices from 1797 to 1865.

Analysis unit

Persons, households, and dwellings

UNITS IDENTIFIED: - Dwellings: yes - Vacant Units: no - Households: yes - Individuals: yes - Group quarters: yes

UNIT DESCRIPTIONS: - Dwellings: A separate inhabited tenement, containing one or more families under one roof. Where several tenements are in one block, with walls either of brick or wood to divide them, having separate entrances, they are each to be numbered as separate houses; but where not so divided, they are to be numbered as one house. - Households: One person living separately in a house, or a part of a house, and providing for him or herself, or several persons living together in a house, or in part of a house, upon one common means of support, and separately from others in similar circumstances - Group quarters: Yes

Universe

All persons living in the United States including temporarily absent residents and sailors at sea, no matter how long they may have been absent, if they were believed to be still alive. "Indians not taxed", which refers to Native Americans living on reservations or under tribal rule. Native Americans who had renounced tribal rule and "exercise the rights of citizens" were to be enumerated.

Kind of data

Population and Housing Census [hh/popcen]

Sampling procedure

MICRODATA SOURCE: Department of the Interior

SAMPLE SIZE (person records): 273596.

SAMPLE DESIGN: 1-in-100 national random sample of the free population. African-American slaves are not included in this dataset. Individual-level data on the 1860 slave population is available at the

Mode of data collection

Face-to-face [f2f]

Research instrument

The census operation involved six forms. Form 1 was used to enumerate free persons and collected information on individual characteristics. Form 2 was used to enumerate slaves. Other forms were used to record information about agriculture and industry.

“Slave Statistics” consists of 7,289 records derived from lists of enslaved individuals in Anne Arundel and Montgomery counties as of November 1, 1864, the date when the Constitution of 1864, which abolished slavery in the state of Maryland, took effect. Maryland remained in the Union during the Civil War, despite the divided loyalties of her people. Because Maryland was a Union state, Lincoln's Emancipation Proclamation did not free Maryland slaves. Many enslaved people, however, had taken advantage of the war's confusion to leave their enslavers earlier, some by joining the Union Army. Hoping that the federal government would repay the state's loyalty and compensate its citizens for the chattels lost, the General Assembly ordered that a listing be made of all slaveholders and their slaves as of November 1, 1864. The federal government never compensated the owners, but these records, called “Slave Statistics,” are the only evidence available of enslaved people and owners at the time of state emancipation. The Maryland State Archives retains the Slave Statistics reports for 1867-1869 for eight Maryland counties; the dataset includes information from two of the eight counties, Anne Arundel and Montgomery. The dataset includes all information on the original lists, including names of enslavers; county and district of residence; names of enslaved individuals and their physical condition, term of servitude, and Union Army service, including regiment; record date; and compensation (if applicable).

The company known as Franklin & Armfield was the largest slave-trading business in the United States during its years of operation from 1828 to 1836, and it may have been the largest in American history. Partners and agents of the company sold more than 1,600 enslaved people in New Orleans, which housed the largest market for enslaved people in the entire country. The dataset included here contains detailed information about those sales, documenting the names of the enslaved and the individuals who purchased them, some demographic and physical descriptions of the enslaved, the terms of their sales, and other relevant matters. Most information was extracted from records kept by notaries who recorded many of the slave sales in the city.

In Africa, where domestic slavery was the predominant form of slavery, female slaves were usually favored as they were perceived as being more easily-controlled and less likely to rebel. In the Americas, however, where productive slavery was more prevalent, male slaves were preferred due to the physical intensity of the labor and the perception that they were more likely to survive seasoning or acclimatization to the new environment (in reality, male slaves in the New World had a much higher mortality rate than female slaves).

It is often quoted that slavers aimed to capture two male slaves for every female slave, yet most sources suggest that this target was rarely met. The averages shown here suggest that the gender ratio among slaves was around 179 males for every 100 females, although the difference varied by region, national carrier and century; for example, a much higher share of male slaves was transported to Cuba in the 19th century, than those transported to British Caribbean colonies in the 18th century. Because of these variations, and the lack of gender ratio from several of the earliest and busiest routes (namely Portuguese voyages to Brazil, which was the most common destination for slaves during the transatlantic slave trade), historians are often reluctant to make overall estimates for the gender ratio during the transatlantic slave trade. Nonetheless, a ratio of 170 to 180 males per 100 females is the most common consensus given among modern historians.

According to records regarding the White House (i.e. census data and purchase or rental contracts), at least 201 slaves were known to have been hired from their owner to help build the White House and Capitol Building between 1792 and 1800. The source details that many slaves involved in this feat were undocumented, therefore the number of slaves who actually took part was likely much higher. Similarly, records also show that there were a number of slaves recorded as living or working on the White House grounds until 1850, during the tenure of ten of the first twelve U.S. presidents. It is important to note, however, that these figures apply only to the slaves who moved with the president to the White House (or were hired from their respective owner), and this data is not reflective of the number of slaves owned by U.S. presidents throughout their lifetimes.

Of these first twelve presidents, John Adams and William Henry Harrison were the only to not have slaves living with them in the White House, although Harrison was an advocate of slavery and was a slave owner during his lifetime. Adams' son, John Quincy Adams, also held a strong anti-slavery stance throughout his political career, however, when John Quincy's sister-in-law and brother-in-law died in 1813 and 1815 respectively, their four children went to stay in the White House and brought with them a small number of slaves.

Between 1628 and 1860, it is estimated that almost 390 thousand Africans were transported as slaves to European colonies in Mainland North America. This figure refers only to those who survived the journey, as it is also thought that over 470 thousand captives embarked on these ships at African ports, however 84 thousand died en route (giving a mortality rate of 17.7 percent). The transportation of African slaves to the Thirteen Colonies was highest in the mid-18th century (although there was some fluctuation), before an observable decline around the time of the American Revolutionary War. Following independence, the importation of slaves remained lower than in previous decades, until it saw a sharp increase in the five years leading up to the slave trade's abolition. In 1807 alone, the year before the U.S. abolished the slave trade, almost 29 thousand slaves were imported from Africa into the U.S. Following this, activity declined greatly; the relatively small number of slaves imported from Africa to the U.S. were most likely into the Spanish territory of Florida. Smuggling also existed on a smaller scale; this accounts for the entries in 1858 and 1860.

A “runaway slave record,” or as it is officially titled, “Runaway and Escaped Slaves Records, 1794, 1806-1863,” include accounts, correspondence, receipts, and reports concerning expenses incurred by localities related to the capture of enslaved people attempting to escape bondage to pursue freedom. The collection also includes records with information related to enslaved people from multiple localities who escaped to United States military forces during the Civil War. While many independent businesses bought and sold human beings, local and state governments such as the state of Virginia also participated in and profited from human trafficking. Localities were reimbursed for the expenses of confining, feeding, and selling of self-emancipated people, and likewise, the state established procedures to compensate enslavers for their financial loss when enslaved people ran away or were imprisoned or executed. If a person was captured and their enslaver could not be identified, they became the property of the state and were sold. The proceeds from these sales went to the state treasury, and often, records of those sales can be found in the Public Claims records from the Auditor of Public Accounts. The net proceeds were deposited into the Commonwealth of Virginia’s Literary Fund for the public education of poor white children.

The data in this collection is drawn directly from the historical documents and may contain language that is now deemed offensive.

Context

Abraham Lincoln's election produced Southern secession, war, and abolition. This dataset was used to study connections between news and slave prices for the period 1856-1861. By August 1861, slave prices had declined by roughly one-third from their 1860 peak. That decline was similar for all age and sex cohorts and thus did not reflect expected emancipation without compensation. The decision to secede reflected beliefs that the North would not invade and that emancipation without compensation was unlikely. Both were encouraged by Lincoln's conciliatory tone before the attack on Fort Sumter, and subsequently dashed by Lincoln's willingness to wage all-out war.

Calomiris, Charles W., and Jonathan Pritchett. 2016. "Betting on Secession: Quantifying Political Events Surrounding Slavery and the Civil War." American Economic Review, 106(1): 1-23.

Content

Data description: by Jonathan Pritchett These data were collected from the office of the Orleans parish Civil Clerk of Court. The sample includes all slave sales recorded by the register of conveyance from October 1856 to August 1861. The construction of the dataset is similar to that employed previously by Fogel and Engerman (1976). The unit of observation is the individual with the exception of children who were bundled with their mothers. Fields are defined as follows:

• ID number: Unique observation number.
• Conveyance: Number of Conveyance volume.
• Page: Page number of transaction.
• Researcher: Initials of research assistant who transcribed transaction.
• Notary First Name: First name of public notary who recorded transaction.
• Notary Last Name: Last name of public notary.
• Sales Date: Sales date of transaction (MM/DD/YYYY format). This is NOT the date the sale was recorded in conveyance office.
• Sellers First Name: Seller’s First Name.
• Sellers Last Name: Seller’s Last Name.
• Sellers County of Origin: Seller’s county (or city) of origin.
• Sellers State of Origin: Seller’s state of origin.
• Representing Seller: Name of agent representing seller if seller is not present at time of sale (normally blank).
• Relationship to Seller: Agent’s relationship to seller.
• Buyers First Name: Buyer’s First Name.
• Buyers Last Name: Buyer’s Last Name.
• Buyers County of Origin: Buyer’s County (or city) of Origin.
• Buyers State of Origin: Buyer’s State of Origin.
• Representing Buyer: Name of agent representing buyer if buyer is not present at time of sale (normally blank).
• Relationship to Buyer: Agent’s relationship to buyer.
• Slave Name: Slave’s first name; rarely last name also listed.
• Sex: Male (M) or female (F). Gender often inferred from sale record, such as Negro vs. Negress, mulatto vs. mulattress, etc.
• Age: Age in years.
• Color: Description of slave’s skin color, but may also indicate ancestry (such as mulatto).
• Occupation: Slave’s occupation – often blank.
• Family Relationship: Describes family relationship of slaves (if any) sold in groups
• Name Child 1: Name of child 1 (sold with mother). Blank when slaves are listed separately and/or with separate prices.
• Sex Child 1: Gender of child 1 (sold with mother).
• Age Child 1: Age in years of child 1 (sold with mother). Decimal equivalents for age in months.
• Name Child 2: Name of child 2 (sold with mother). Blank when slaves are listed separately and/or with separate prices.
• Sex Child 2: Gender of child 2 (sold with mother).
• Age Child 2: Age in years of child 2 (sold with mother). Decimal equivalents for age in months.
• Name Child 3: Name of child 3 (sold with mother). Blank when slaves are listed separately and/or with separate prices.
• Sex Child 3: Gender of child 3 (sold with mother).
• Age Child 3: Age in years of child 3 (sold with mother). Decimal equivalents for age in months.
• Name Child 4: Name of child 4 (sold with mother). Blank when slaves are listed separately and/or with separate prices.
• Sex Child 4: Gender of child 4 (sold with mother).
• Age Child 4: Age in years of child 4 (sold with mother). Decimal equivalents for age in months.
• Name Child 5: Name of child 5 (sold with mother). Blank when slaves are listed separately and/or with separate prices
• Sex Child 5: Gender of child 5 (sold with mother).
• Age Child 5: Age in years of child 5 (sold with mother). Decimal equivalents for age in months.
• Name Child 6: Name of child 6 (sold with mother). Blank when slaves are listed separately and/or with separate prices
• Sex Child 6: Gender of child 6 (sold with mother).
• Age Child 6: Age in years of child 6 (sold with mother). Decimal equivalents for age in months.
• Name Child 7: Name of child 7 (sold with mother). Blank when slaves are listed separately and/or with separate prices.
• Sex Child 7: Gender of child 7 (sold with mother).
• Age Child 7: Age in years of child 7 (sold with mother). Decimal equivalents for age in months.
• Name C...

This project entailed recording and coding information from slave narratives gathered as part of the Federal Writers' Project. Between 1936 and 1938, federal authorities organized teams of interviewers in seventeen states who gathered the recollections of over two thousand former slaves. The typescript of these interviews, running to more than ten thousand pages, was deposited in the Library of Congress and has been available on microfiche for many years. Information on the actions, attitudes, beliefs and experiences of slaves was coded from 2,358 slave narratives.

This statistic shows the population of the United States in the final census year before the American Civil War, shown by race and gender. From the data we can see that there were almost 27 million white people, 4.5 million black people, and eighty thousand classed as 'other'. The proportions of men to women were different for each category, with roughly 700 thousand more white men than women, over 100 thousand more black women than men, and almost three times as many men than women in the 'other' category. The reason for the higher male numbers in the white and other categories is because men migrated to the US at a higher rate than women, while there is no concrete explanation for the statistic regarding black people.

The Natchez Database of Free People of Color (NDFPC) contains data about Natchez, Mississippi’s free Black community during the Spanish era (1779-1795) and after the United States acquired it in 1796 until 1865. It records the name of every free black individual who surfaced in the author’s research; diligent attention was paid to entering values like gender, age, race, property ownership, occupation, literacy, experiences of violence, among many others (53 in total) in the dataset. The companion to the NDFPC is the Natchez Index of Free Individuals and Families of Color, which is an approximately 500-page text document that archives transcriptions of records on the 1,018 free Black individuals who lived or stayed in Natchez during those years. It is organized alphabetically by surname when known or by first name. Digitization of the dataset and index will facilitate research by descendants engaged in genealogical research and other scholars of enslaved and free people of color.

The records found in this collection include requisition lists filed in local courts and payroll records of the Virginia Engineer Department. Information found in these records include names of enslaved and free Black people, locality of origin, occupation, location of fortification, names of enslavers, and monetary value of enslaved people. Virginia enacted legislation as early as July 1, 1861 during the Civil War to requisition enslaved and free Black people to work on military fortifications and other defensive works around the commonwealth. From 1862 to 1863, at the request of the president of the Confederate States, the General Assembly passed three more laws that requisitioned enslaved laborers to work on fortifications and other works of the defense. Each county and city were given a certain number of enslaved laborers that had to be provided to the government under the requisition act. Enslaved people requisitioned for service did not have a choice. In many cases, the alternative was severe punishment or to be hanged.

Descriptions included in this dataset are drawn directly from the original documents and may contain language which is now deemed offensive.

This data collection contains information about the population of each county, town, and city of the United States in 1850 and 1860. Specific variables include tabulations of white, black, and slave males and females, and aggregate population for each town. Foreign-born population, total population of each county, and centroid latitudes and longitudes of each county and state were also compiled.

This study presents 1860 data on population and farm production in 5,228 farms located in 405 major cotton-producing counties in the South. The data was compiled from the agriculture, slave, and population schedules of the 1860 United States manuscript Census. For each farm, variables describing farm land, machinery, crops, and livestock are included, as well as production figures for specific crops and types of livestock on the farm. The population variables tabulate the free and slave residents of each farm by sex, race, and age in five- or ten-year categories.

This dataset involves over 5,500 cases related to the capture of upwards of 700,000 enslaved people from Africa by eighteen governments during the suppression of the slave trade from Africa between 1800 and 1920. The data follows events in the experiences of "Liberated Africans," from their regional departure in Africa and trials resulting in involuntary indentures. In legal terms, “Liberated African” referred to an enslaved person captured from a slave ship at sea or seized on land, condemned as property by a government, and declared free under any of the decrees, acts, treaties, or conventions for the abolition or suppression of the slave trade. Under the control of a state, the “freed” person was then subject to a period of indenture, and to a lesser extent conscription, lasting several years. By extension, other state-run schemes adopted and adapted this model to involve situations in which enslaved people were purchased or sought asylum from enslavement in colonial offices and consulates. After, the people were emancipated through state intervention and subjected to comparable indentures. These data relate to the relaunch of https://liberatedafricans.org/ on 1 June 2023.