*********************, who became prime minister of ******* in December 2024, is the youngest state leader worldwide, aged **. Ibrahim Traore of Burkina Faso and Daniel Noboa of Ecuador are aged **, too. Conversely, the oldest state leader in the world is ********* of ********, aged **.

In 2022, the state with the highest median age of its population was Maine at 45.1 years. Utah had the lowest median age at 32.1 years. View the distribution of the U.S. population by ethnicity here.

Additional information on the aging population in the United States

High birth rates during the so-called baby boom years that followed World War II followed by lower fertility and morality rates have left the United States with a serious challenge in the 21st Century. However, the issue of an aging population is certainly not an issue unique to the United States. The age distribution of the global population shows that other parts of the world face a similar issue.

Within the United States, the uneven distribution of populations aged 65 years and over among states offers both major challenges and potential solutions. On the one hand, federal action over the issue may be contentious as other states are set to harbor the costs of elderly care in states such as California and Florida. That said, domestic migration from comparably younger states may help to fill gaps in the workforce left by retirees in others.

Nonetheless, aging population issues are set to gain further prominence in the political and economic decisions made by policymakers regardless of the eventual distribution of America’s elderly. Analysis of the financial concerns of Americans by age shows many young people still decades from retirement hold strong concern over their eventual financial position.

As of 2023, the youngest member of the United States Senate was John Ossoff, at 35 years old. Although the minimum age requirement to run for a Senate seat is **, all but two Senate members in the ***** U.S. Congress were over 40 years old.

As of 2023, the youngest member of the United States House of Representatives was Maxwell Alejandro Frost. Elected at **, Frost was the first and only Generation Z member of the ***** U.S. Congress. There was a considerable age gap between Frost and the other youngest members of the House of Representatives, who were all between 33 and 34 years old.

This data set illustrates where the youth of the nation reside. Included in the data set are the rankings of city by age and the median age of the city. Source: Census data, Onboard 2006 projection URL: http://money.cnn.com/magazines/moneymag/bplive/2007/top25s/youngest.html Date Accessed: October 16, 2007

The dataset Zagreb Building Stock Model is a polygon layer containing data of the name, type, address, and age of buildings. The aim of the dataset is to collect, integrate, and organize data on the age of buildings in Zagreb. The dataset is created from existing datasets of state and city institutions such as cadastral data, official registers of public authorities, historical registers, and other relevant data sources.

Families by age of youngest child by Electoral Divisions. (Census 2022 Theme 4 Table 4 )Census 2022 table 4.4 is families by age of youngest child. Details include family units by age of youngest child, number of families and number of persons. Census 2022 theme 4 is Families. Electoral Divisions (EDs) are the smallest legally defined administrative areas in the State. There are 3,440 legally defined EDs in the State. However, in order to render them suitable for the production of statistics, the CSO has amended some ED boundaries to ensure that statistical disclosure does not occur. This has had the effect of amalgamating some EDs and splitting others. The amending of the Cork City and Cork County boundaries necessitated a redrawing of Electoral Division boundaries within Cork to ensure all ED boundaries in the county were suitable for the production of statistical data. For Census 2022, the CSO is publishing data for 3,420 CSO Electoral Divisions. The CSO Electoral divisions are referred to by their established statutory names.Formally “District Electoral Divisions” (DEDs), under the 2001 Local Government Act, the names of Wards and the names of District Electoral Divisions were changed to Electoral Divisions. Coordinate reference system: Irish Transverse Mercator (EPSG 2157). These boundaries are based on 20m generalised boundaries sourced from Tailte Éireann Open Data Portal. CSO Electoral Divisions 2022

Since 1789, 45 different men have served as President of the United States, and the average age of these men when taking office for the first time was approximately 57 years. Two men, Grover Cleveland and Donald Trump, were elected to two non-consecutive terms, and Donald Trump's victory in 2024 made him the oldest man ever elected as president, where he will be 78 years and seven months old when taking office again. Record holders The oldest president to take office for the first time was Joe Biden in 2021, at 78 years and two months - around five months younger than Donald Trump when he assumes office in 2025. The youngest presidents to take office were Theodore Roosevelt in 1901 (42 years and 322 days), who assumed office following the assassination of William McKinley, and the youngest elected president was John F Kennedy in 1961 (43 years and 236 days). Historically, there seems to be little correlation between age and electability, and the past five presidents have included the two oldest to ever take office, and two of the youngest. Requirements to become president The United States Constitution states that both the President and Vice President must be at least 35 years old when taking office, and must have lived in the United States for at least 14 years of their life. Such restrictions are also in place for members of the U.S. Congress, although the age and residency barriers are lower. Additionally, for the roles of President and Vice President, there is a "natural-born-citizen" clause that was traditionally interpreted to mean candidates must have been born in the U.S. (or were citizens when the Constitution was adopted). However, the clause's ambiguity has led to something of a reinterpretation in the past decades, with most now interpreting it as also applying to those eligible for birthright citizenship, as some recent candidates were born overseas.

Families by age of youngest child by Province. (Census 2022 Theme 4 Table 4 )Census 2022 table 4.4 is families by age of youngest child. Details include family units by age of youngest child, number of families and number of persons. Census 2022 theme 4 is Families. Ireland is divided into four provinces - Leinster, Ulster, Munster and Connacht. They do not have any administrative functions and they are relevant for a number of historical, cultural and sporting reasons. The borders of the provinces coincide with the boundaries of counties. Three of the nine counties in Ulster are within the jurisdiction of the State.Coordinate reference system: Irish Transverse Mercator (EPSG 2157). These boundaries are based on 20m generalised boundaries sourced from Tailte Éireann Open Data Portal. Provinces - National Statutory Boundaries - 2019This dataset is provided by Tailte Éireann

This feature layer was created using Census 2016 data produced by the Central Statistics Office (CSO) and Province boundary data (generalised to 100m) produced by Tailte Éireann. The layer represents Census 2016 theme 4.4, families by age of youngest child. Attributes include breakdown of family units by age of youngest child, number of families and number of persons (e.g. families with youngest child aged 0-4 (No. of families), families with youngest child aged 10-14 (No. of persons)). Census 2016 theme 4 represents Families. The Census is carried out every five years by the CSO to determine an account of every person in Ireland. The results provide information on a range of themes, such as, population, housing and education. The data were sourced from the CSO. Province Boundaries Generalised to 100m. Ireland is divided into four provinces called Leinster, Ulster, Munster and Connacht. Although they presently do not have any administrative functions, they are relevant for a number of historical, cultural and sporting reasons. The borders of the provinces coincide exactly with the boundaries of the administrative counties. Three of the nine counties in Ulster are within the jurisdiction of the State.

According to Article II: Section one of the United States Constitution, the President of the United States (as well as the Vice President) must be at least 35 years of age, and have lived in the country for at least 14 years when taking office. Requirements for the House of Representatives and the Senate are also outlined in the Constitution, in Article I: Sections two and three, although figures are lower. There is no minimum age for Supreme Court Justices given in the constitution. Terms and term lengths The President of the United States is elected for a term of four years, and may hold office for a maximum of two terms (Franklin D. Roosevelt is the only president to have served more than two terms, as an exception was made during the Second World War). There is no maximum number of terms for Vice Presidents, who may hypothetically serve in the role under a number of presidents, although no Vice President has ever served more than two full terms. In the event of a President's death or removal from office, the Vice President would then assume the presidency - if the remaining term time is less than two years then this person may seek two further terms in the presidency, giving a maximum term length of 10 years (although this has never happened). For representatives and senators, there is no maximum number of terms providing the candidate wins re-election. Some states did have term limits in the past, but these were invalidated in 1995 when the Supreme Court ruled that no state can impose stricter qualifications than those outlined in the Constitution. The longest-serving Senator was Robert Byrd, who served for over 51 years between 1959 and 2010, while the longest-serving Representative was John Dingell Jr., who served for over 59 years between 1955 and 2015. As appointments to the Supreme Court are lifetime appointments, they are not restricted by term lengths or limits. Natural-born-citizen clause Unlike the other roles, the Constitution includes a "natural-born-citizen" clause in reference to the President and Vice President, where a person must have been born in the U.S. (or be a citizen at the time of the Constitution's adoption) to be eligible for either role. This was included to prevent unwanted foreign influence at the highest level of U.S. government. Historically, there were few challenges to this clause, however, as there is no clear definition of what makes a natural-born-citizen, it has been addressed several times in the past two decades. This was most notable in the 2008 election, where John McCain's status was called into question since he was born in the United States' Panama Canal Zone, while Barack Obama's eligibility was questioned due to a widely-discredited conspiracy theory that he was born in Kenya (this became known as the "birther movement"). Since 2016, questions were raised over candidates such as Ted Cruz and Tulsi Gabbard, who acquired U.S. citizenship through their parents - since this time it has become more widely accepted that those who qualify for birthright citizenship should also be considered natural-born-citizens.

Population pyramids provide a way to visualize the age and sex composition of a geographic region, such as a nation, state, or county. A standard population pyramid divides sex into two bar charts or histograms, one for the male population and one for the female population. The two charts mirror each other and are divide age into 5-year cohorts. The shape of a population pyramid provides insights into a region’s fertility, mortality, and migration patterns. When a region has high fertility and mortality, but low migration the visualization will look like a pyramid, with the youngest age cohort (0-4 years) representing the largest percent of the population and each older cohort representing a progressively smaller percent of the population.

In many regions fertility and mortality have decreased significantly since 1970, as people live longer and women have fewer children. With lower fertility and mortality, population pyramids are shaped more like a pillar.

While population pyramids can be made for any geographic region, when interpreting population pyramids for smaller areas (like counties) the most important force that shapes the pyramid is often in- and out-migration (Wang and vom Hofe, 2006, p. 65). For smaller regions, population pyramids can have unique shapes.

This data archive provides the resources needed to generate population pyramids for the United States, individual states, and any county within the United States. Population pyramids usually require significant data cleaning and graph making skills to generate one pyramid. With this data archive the data cleaning has been completed and the R script provides reusable code to quickly generate graphs. The final output is an image file with six graphs on one page. The final layout makes it easy to compare changes in population age and sex composition for any state and any county in the US for 1970, 1980, 1990, 2000, 2010, and 2017.

As of early 2021, small island developing states had the youngest fleet compared with other state types. More than half of the fleet belonging to small island developing states was younger than 10 years.

In the second quarter of 2020, about 63 percent of internet users in the United States said they had a negative attitude towards ads in online video clips. About 47 percent of respondents said the same about ads on websites.

Negative attitudes by age group

In the second quarter of 2018, the specific age groups of internet users in the United States were also examined. The people that were most annoyed by ads on websites were persons aged 56 and older. Almost sixty percent of this group held a negative viewpoint towards them. Just under forty percent of the youngest group (between the ages of 15 and 25) had the same negative opinion on website ads. However, online video ads were even less well-received in the United States that quarter, as each of the age groups felt more negatively towards them, compared to how they felt about ads on websites. Roughly sixty percent of the youngest internet users disliked these ads, while just over seventy percent of the oldest users were annoyed by them.

Africa has the youngest population in the world. Among the 35 countries with the lowest median age worldwide, only three fall outside the continent. In 2023, the median age in Niger was 15.1 years, the youngest country. This means that at this age point, half of the population was younger and half older. A young population reflects several demographic characteristics of a country. For instance, together with a high population growth, life expectancy in Western Africa is low: this reached 58 years for men and 60 for women in 2024. Overall, Africa has the lowest life expectancy in the world.

Africa’s population is still growing Africa’s population growth can be linked to a high fertility rate, along with a drop in death rates. Despite the fertility rate on the continent following a constant declining trend, it remains far higher compared to all other regions worldwide. It was forecast to reach 4.02 children per woman, compared to a worldwide average of 2.25 children per woman in 2024. Furthermore, the crude death rate in Africa overall dropped, only increasing slightly during the coronavirus (COVID-19) pandemic. The largest populations on the continent Nigeria, Ethiopia, Egypt, and the Democratic Republic of Congo are the most populous African countries. In 2025, people living in Nigeria amounted to over 237 million, while the number for the three other countries exceeded 100 million each. Of those, the Democratic Republic of Congo sustained the fourth-highest fertility rate in Africa in 2023. Nigeria and Ethiopia also had high rates, with 4.48 and 3.99 births per woman, respectively. Although such a high fertility rate is expected to slow down, it will still impact the population structure, growing younger nations.

Aedes aegypti is an important vector of dengue virus and other arboviruses that affect human health. After being ingested in an infectious bloodmeal, but before being transmitted from mosquito to human, dengue virus must disseminate from the vector midgut into the hemocoel and then the salivary glands. This process, the extrinsic incubation period, typically takes 6–14 days. Since older mosquitoes are responsible for transmission, understanding the age structure of vector populations is important. Transcriptional profiling can facilitate predictions of the age structures of mosquito populations, critical for estimating their potential for pathogen transmission. In this study, we utilized a two-gene transcript model to assess the age structure and daily survival rates of three populations (Key West, Marathon, and Key Largo) of Ae. aegypti from the Florida Keys, United States, where repeated outbreaks of autochthonous dengue transmission have recently occurred. We found that Key Largo had the youngest Ae. aegypti population with the lowest daily survival rate, while Key West had the oldest population and highest survival rate. Across sites, 22.67% of Ae. aegypti females were likely old enough to transmit dengue virus (at least 15 days post emergence). Computed estimates of the daily survival rate (0.8364 using loglinear and 0.8660 using non-linear regression), indicate that dengue vectors in the region experienced relatively low daily mortality. Collectively, our data suggest that Ae. aegypti populations across the Florida Keys harbor large numbers of older individuals, which likely contributes to the high risk of dengue transmission in the area.

Kazakhstan had the youngest population among the Commonwealth of Independent States (CIS) countries, with over 31 percent of the country's population being under 15 years of age and around a percent being 65 years or older. In Ukraine, on the other hand, a higher share of the population was between 14 to 65 years of age than the population under 15 years of age.

As of 2025, the average age of senators in the 119th Congress was **. Of the total 100, ** members of the U.S. Senate were between the ages of ** and ** - more than any other age group. The minimum age requirement to be a member of the Senate is **, opposed to the House of Representatives which has a minimum age requirement of **. The average age of members of Congress from 2009 to 2023 can be found here.

The estimated per capita income across Sikkim was the highest among Indian states at around *** thousand Indian rupees in the financial year 2024. Meanwhile, it was the lowest in the northern state of Bihar at over ** thousand rupees. India’s youngest state, Telangana stood in the fifth place. The country's average per capita income that year was an estimated *** thousand rupees. What is per capita income? Per capita income is a measure of the average income earned per person in a given area in a certain period. It is calculated by dividing the area's total income by its total population. If absolute numbers are noted, India’s per capita income doubled from the financial year 2015 to 2023. Wealth inequality However, as per economists, the increase in the per capita income of a country does not always reflect an increase in the income of the entire population. Wealth distribution in India remains highly skewed. The average income hides the disbursal and inequality in a society. Especially in a society like India where the top one percent owned over ** percent of the total wealth in 2022.

Since 1789, the United States has had 45 different men serve as president, of which five are still alive today. At 78 years and two months, Joe Biden became the oldest man to ascend to the presidency for the first time in 2021, however Donald Trump was older when he re-entered the White House, at 78 years and seven months. Eight presidents have died while in office, including four who were assassinated by gunshot, and four who died of natural causes. The president who died at the youngest age was John F. Kennedy, who was assassinated at 46 years old in Texas in 1963; Kennedy was also the youngest man ever elected to the office of president. The longest living president in history is Jimmy Carter, who celebrated his 100th birthday in just before his death in 2024. The youngest currently-living president is Barack Obama, who turned 63 in August 2024. Coincidentally, presidents Clinton, Bush Jr., and Trump were all born within 66 days of one another, between June and August 1946. George Washington The U.S.' first president, George Washington, died after developing a severe inflammation of the throat, which modern scholars suspect to have been epiglottitis. However, many suspect that it was the treatments used to treat this illness that ultimately led to his death. After spending a prolonged period in cold and wet weather, Washington fell ill and ordered his doctor to let one pint of blood from his body. As his condition deteriorated, his doctors removed a further four pints in an attempt to cure him (the average human has between eight and twelve pints of blood in their body). Washington passed away within two days of his first symptoms showing, leading many to believe that this was due to medical malpractice and not due to the inflammation in his throat. Bloodletting was one of the most common and accepted medical practices from ancient Egyptian and Greek times until the nineteenth century, when doctors began to realize how ineffective it was; today, it is only used to treat extremely rare conditions, and its general practice is heavily discouraged. Zachary Taylor Another rare and disputed cause of death for a U.S. president was that of Zachary Taylor, who died sixteen months into his first term in office. Taylor had been celebrating the Fourth of July in the nation's capital in 1850, where he began to experience stomach cramps after eating copious amounts of cherries, other fruits, and iced milk. As his condition worsened, he drank a large amount of water in an attempt to alleviate his symptoms, but to no avail. Taylor died of gastroenteritis five days later, after being treated with a heavy dose of drugs and bloodletting. The most commonly accepted theories for his illness are that the ice used in the milk and the water consumed afterwards were contaminated with cholera, and that this was further exacerbated by the large amounts of acid in his system from eating so much fruit. There are some suggestions that recovery was feasible, but the actions of his doctors had made this impossible. Additionally, there have been conspiracy theories suggesting that Taylor was poisoned by pro-slavery secessionists from the Southern States, although there appears to be no evidence to back this up.