In 2023, Washington, D.C. had the highest population density in the United States, with 11,130.69 people per square mile. As a whole, there were about 94.83 residents per square mile in the U.S., and Alaska was the state with the lowest population density, with 1.29 residents per square mile. The problem of population density Simply put, population density is the population of a country divided by the area of the country. While this can be an interesting measure of how many people live in a country and how large the country is, it does not account for the degree of urbanization, or the share of people who live in urban centers. For example, Russia is the largest country in the world and has a comparatively low population, so its population density is very low. However, much of the country is uninhabited, so cities in Russia are much more densely populated than the rest of the country. Urbanization in the United States While the United States is not very densely populated compared to other countries, its population density has increased significantly over the past few decades. The degree of urbanization has also increased, and well over half of the population lives in urban centers.

A dataset listing California counties by population for 2024.

In 2023, the resident population of California was 38.97 million. This is a slight decrease from the previous year, with 39.03 million people in 2022. This makes it the most populous state in the U.S. Californian demographics Along with an increase in population, California’s gross domestic product (GDP) has also been increasing, from 1.7 trillion U.S. dollars in 2000 to 3.23 trillion U.S. dollars in 2023. In the same time period, the per-capita personal income has almost doubled, from 33,403 U.S. dollars in 2000 to 77,339 U.S. dollars in 2022. In 2023, the majority of California’s resident population was Hispanic or Latino, although the number of white residents followed as a close second, with Asian residents making up the third largest demographic in the state. The dark side of the Golden State While California is one of the most well-known states in the U.S., is home to Silicon Valley, and one of the states where personal income has been increasing over the past 20 years, not everyone in California is so lucky: In 2023, the poverty rate in California was about 12 percent, and the state had the fifth-highest rate of homelessness in the country during that same year, with an estimated 46 homeless people per 10,000 of the population.

VITAL SIGNS INDICATOR Migration (EQ4)

FULL MEASURE NAME Migration flows

LAST UPDATED December 2018

DESCRIPTION Migration refers to the movement of people from one location to another, typically crossing a county or regional boundary. Migration captures both voluntary relocation – for example, moving to another region for a better job or lower home prices – and involuntary relocation as a result of displacement. The dataset includes metropolitan area, regional, and county tables.

DATA SOURCE American Community Survey County-to-County Migration Flows 2012-2015 5-year rolling average http://www.census.gov/topics/population/migration/data/tables.All.html

CONTACT INFORMATION vitalsigns.info@bayareametro.gov

METHODOLOGY NOTES (across all datasets for this indicator) Data for migration comes from the American Community Survey; county-to-county flow datasets experience a longer lag time than other standard datasets available in FactFinder. 5-year rolling average data was used for migration for all geographies, as the Census Bureau does not release 1-year annual data. Data is not available at any geography below the county level; note that flows that are relatively small on the county level are often within the margin of error. The metropolitan area comparison was performed for the nine-county San Francisco Bay Area, in addition to the primary MSAs for the nine other major metropolitan areas, by aggregating county data based on current metropolitan area boundaries. Data prior to 2011 is not available on Vital Signs due to inconsistent Census formats and a lack of net migration statistics for prior years. Only counties with a non-negligible flow are shown in the data; all other pairs can be assumed to have zero migration.

Given that the vast majority of migration out of the region was to other counties in California, California counties were bundled into the following regions for simplicity: Bay Area: Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, Solano, Sonoma Central Coast: Monterey, San Benito, San Luis Obispo, Santa Barbara, Santa Cruz Central Valley: Fresno, Kern, Kings, Madera, Merced, Tulare Los Angeles + Inland Empire: Imperial, Los Angeles, Orange, Riverside, San Bernardino, Ventura Sacramento: El Dorado, Placer, Sacramento, Sutter, Yolo, Yuba San Diego: San Diego San Joaquin Valley: San Joaquin, Stanislaus Rural: all other counties (23)

One key limitation of the American Community Survey migration data is that it is not able to track emigration (movement of current U.S. residents to other countries). This is despite the fact that it is able to quantify immigration (movement of foreign residents to the U.S.), generally by continent of origin. Thus the Vital Signs analysis focuses primarily on net domestic migration, while still specifically citing in-migration flows from countries abroad based on data availability.

As of 2023, 27.3 percent of California's population were born in a country other than the United States. New Jersey, New York, Florida, and Nevada rounded out the top five states with the largest population of foreign born residents in that year. For the country as a whole, 14.3 percent of residents were foreign born.

New York was the most populous state in the union in the year 1900. It had the largest white population, for both native born and foreign born persons, and together these groups made up over 7.1 million of New York's 7.2 million inhabitants at this time. The United States' industrial centers to the north and northeast were one of the most important economic draws during this period, and states in these regions had the largest foreign born white populations. Ethnic minorities Immigration into the agricultural southern states was much lower than the north, and these states had the largest Black populations due to the legacy of slavery - this balance would begin to shift in the following decades as a large share of the Black population migrated to urban centers to the north during the Great Migration. The Japanese and Chinese populations at this time were more concentrated in the West, as these states were the most common point of entry for Asians into the country. The states with the largest Native American populations were to the west and southwest, due to the legacy of forced displacement - this included the Indian Territory, an unorganized and independent territory assigned to the Native American population in the early 1800s, although this was incorporated into Oklahoma when it was admitted into the union in 1907. Additionally, non-taxpaying Native Americans were historically omitted from the U.S. Census, as they usually lived in separate communities and could not vote or hold office - more of an effort was made to count all Native Americans from 1890 onward, although there are likely inaccuracies in the figures given here. Changing distribution Internal migration in the 20th century greatly changed population distribution across the country, with California and Florida now ranking among the three most populous states in the U.S. today, while they were outside the top 20 in 1900. The growth of Western states' populations was largely due to the wave of internal migration during the Great Depression, where unemployment in the east saw many emigrate to "newer" states in search of opportunity, as well as significant immigration from Latin America (especially Mexico) and Asia since the mid-1900s.

Chart and table of population level and growth rate for the Los Angeles metro area from 1950 to 2025. United Nations population projections are also included through the year 2035.

440,813 (Persons) in 2024. All the people who reside in the country at the time of the interview, whether domestic or foreign. It includes Mexican diplomats functioning overseas and family members residing with them, those who cross the border daily to work in another country, and homeless population. Do not include foreigners who do office or diplomatic work in the country or their families. Until 1900 Quintana Roo was included in Yucatan, Baja California Sur was included in Baja California. Figures for the following census dates: October 20 (1895), October 28 (1900), October 27 (1910), November 30 (1920), May 15 (1930), March 6 (1940), June 6 (1950), June 8 (1960), January 28 (1970), June 4 (1980), March 12 (1990), November 5 (1995), February 14 (2000), 19 October (2005) and June 12 (2010).

427,809 (Persons) in 2024. All the people who reside in the country at the time of the interview, whether domestic or foreign. It includes Mexican diplomats functioning overseas and family members residing with them, those who cross the border daily to work in another country, and homeless population. Do not include foreigners who do office or diplomatic work in the country or their families. Until 1900 Quintana Roo was included in Yucatan, Baja California Sur was included in Baja California. Figures for the following census dates: October 20 (1895), October 28 (1900), October 27 (1910), November 30 (1920), May 15 (1930), March 6 (1940), June 6 (1950), June 8 (1960), January 28 (1970), June 4 (1980), March 12 (1990), November 5 (1995), February 14 (2000), 19 October (2005) and June 12 (2010).

3.521.242 (Persons) in 2018. All the people who reside in the country at the time of the interview, whether domestic or foreign. It includes Mexican diplomats functioning overseas and family members residing with them, those who cross the border daily to work in another country, and homeless population. Do not include foreigners who do office or diplomatic work in the country or their families. Until 1900 Quintana Roo was included in Yucatan, Baja California Sur was included in Baja California. Figures for the following census dates: October 20 (1895), October 28 (1900), October 27 (1910), November 30 (1920), May 15 (1930), March 6 (1940), June 6 (1950), June 8 (1960), January 28 (1970), June 4 (1980), March 12 (1990), November 5 (1995), February 14 (2000), 19 October (2005) and June 12 (2010).

The population in non-family households in Baja California increased by 92.5 thousand people (+75.07 percent) compared to the previous year. With 215.76 thousand people, the population thereby reached its highest value in the observed period. Notably, the population continuously increased over the last years.For more insights about the population in non-family households consider different countries: In 2020, in comparison to Baja California, the population in San Luis Potosí was lower and in Baja California Sur it was considerably lower.

771,294 (Persons) in 2018. All the people who reside in the country at the time of the interview, whether domestic or foreign. It includes Mexican diplomats functioning overseas and family members residing with them, those who cross the border daily to work in another country, and homeless population. Do not include foreigners who do office or diplomatic work in the country or their families. Until 1900 Quintana Roo was included in Yucatan, Baja California Sur was included in Baja California. Figures for the following census dates: October 20 (1895), October 28 (1900), October 27 (1910), November 30 (1920), May 15 (1930), March 6 (1940), June 6 (1950), June 8 (1960), January 28 (1970), June 4 (1980), March 12 (1990), November 5 (1995), February 14 (2000), 19 October (2005) and June 12 (2010).

Population 26 years and over Health Insurance Coverage Statistics for 2022. This is part of a larger dataset covering consumer health insurance coverage rates in Country Club, California by age, education, race, gender, work experience and more.

VITAL SIGNS INDICATOR Migration (EQ4)

FULL MEASURE NAME Migration flows

LAST UPDATED December 2018

DESCRIPTION Migration refers to the movement of people from one location to another, typically crossing a county or regional boundary. Migration captures both voluntary relocation – for example, moving to another region for a better job or lower home prices – and involuntary relocation as a result of displacement. The dataset includes metropolitan area, regional, and county tables.

DATA SOURCE American Community Survey County-to-County Migration Flows 2012-2015 5-year rolling average http://www.census.gov/topics/population/migration/data/tables.All.html

CONTACT INFORMATION vitalsigns.info@bayareametro.gov

METHODOLOGY NOTES (across all datasets for this indicator) Data for migration comes from the American Community Survey; county-to-county flow datasets experience a longer lag time than other standard datasets available in FactFinder. 5-year rolling average data was used for migration for all geographies, as the Census Bureau does not release 1-year annual data. Data is not available at any geography below the county level; note that flows that are relatively small on the county level are often within the margin of error. The metropolitan area comparison was performed for the nine-county San Francisco Bay Area, in addition to the primary MSAs for the nine other major metropolitan areas, by aggregating county data based on current metropolitan area boundaries. Data prior to 2011 is not available on Vital Signs due to inconsistent Census formats and a lack of net migration statistics for prior years. Only counties with a non-negligible flow are shown in the data; all other pairs can be assumed to have zero migration.

Given that the vast majority of migration out of the region was to other counties in California, California counties were bundled into the following regions for simplicity: Bay Area: Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, Solano, Sonoma Central Coast: Monterey, San Benito, San Luis Obispo, Santa Barbara, Santa Cruz Central Valley: Fresno, Kern, Kings, Madera, Merced, Tulare Los Angeles + Inland Empire: Imperial, Los Angeles, Orange, Riverside, San Bernardino, Ventura Sacramento: El Dorado, Placer, Sacramento, Sutter, Yolo, Yuba San Diego: San Diego San Joaquin Valley: San Joaquin, Stanislaus Rural: all other counties (23)

One key limitation of the American Community Survey migration data is that it is not able to track emigration (movement of current U.S. residents to other countries). This is despite the fact that it is able to quantify immigration (movement of foreign residents to the U.S.), generally by continent of origin. Thus the Vital Signs analysis focuses primarily on net domestic migration, while still specifically citing in-migration flows from countries abroad based on data availability.

Chart and table of population level and growth rate for the San Jose metro area from 1950 to 2025. United Nations population projections are also included through the year 2035.

The population in non-family households in Baja California Sur increased by 18.2 thousand people (+67.38 percent) compared to the previous year. Therefore, the population in Baja California Sur reached a peak in 2020 with 45.24 thousand people. Notably, the population continuously increased over the last years.For more insights about the population in non-family households consider different countries: In 2020, in comparison to Baja California Sur, the population in Sinaloa was higher and in Oaxaca it was considerably higher.

Chart and table of population level and growth rate for the Sacramento metro area from 1950 to 2025. United Nations population projections are also included through the year 2035.

38,5 (Percent) in 2010. All the people who reside in the country at the time of the interview, whether domestic or foreign. It includes Mexican diplomats functioning overseas and family members residing with them, those who cross the border daily to work in another country, and homeless population. Do not include foreigners who do office or diplomatic work in the country or their families. Until 1900 Quintana Roo was included in Yucatan, Baja California Sur was included in Baja California. Figures for the following census dates: October 20 (1895), October 28 (1900), October 27 (1910), November 30 (1920), May 15 (1930), March 6 (1940), June 6 (1950), June 8 (1960), January 28 (1970), June 4 (1980), March 12 (1990), November 5 (1995), February 14 (2000), 19 October (2005) and June 12 (2010).

Male population of Nayarit went up by 1.24% from 670,160 persons in 2023 to 678,471 persons in 2024. Since the 1.74% improve in 2014, male population rocketed by 15.47% in 2024. All the people who reside in the country at the time of the interview, whether domestic or foreign. It includes Mexican diplomats functioning overseas and family members residing with them, those who cross the border daily to work in another country, and homeless population. Do not include foreigners who do office or diplomatic work in the country or their families. Until 1900 Quintana Roo was included in Yucatan, Baja California Sur was included in Baja California. Figures for the following census dates: October 20 (1895), October 28 (1900), October 27 (1910), November 30 (1920), May 15 (1930), March 6 (1940), June 6 (1950), June 8 (1960), January 28 (1970), June 4 (1980), March 12 (1990), November 5 (1995), February 14 (2000), 19 October (2005) and June 12 (2010).

9.041.395 (Persons) in 2018. All the people who reside in the country at the time of the interview, whether domestic or foreign. It includes Mexican diplomats functioning overseas and family members residing with them, those who cross the border daily to work in another country, and homeless population. Do not include foreigners who do office or diplomatic work in the country or their families. Until 1900 Quintana Roo was included in Yucatan, Baja California Sur was included in Baja California. Figures for the following census dates: October 20 (1895), October 28 (1900), October 27 (1910), November 30 (1920), May 15 (1930), March 6 (1940), June 6 (1950), June 8 (1960), January 28 (1970), June 4 (1980), March 12 (1990), November 5 (1995), February 14 (2000), 19 October (2005) and June 12 (2010).