In 2022, 77.9 percent of people aged between 65 and 74 years old were registered to vote in the United States - the highest share of any age group. In comparison, 49.1 percent of 18 to 24 year-olds were registered to vote in that year.

Since 1964, voter turnout rates in U.S. presidential elections have generally fluctuated across all age groups, falling to a national low in 1996, before rising again in the past two decades. Since 1988, there has been a direct correlation with voter participation and age, as people become more likely to vote as they get older. Participation among eligible voters under the age of 25 is the lowest of all age groups, and in the 1996 and 2000 elections, fewer than one third of eligible voters under the age of 25 participated, compared with more than two thirds of voters over 65 years.

During the weeks leading up to the presidential election, early voting began in almost all states, with over 80 million ballots being cast nationally as of Election Day. Although 39 percent of mail-in and early in-person votes were cast by voters aged 65 or older, ten percent of those aged 18 to 29 years old voted early.

In the 1824 U.S presidential election, which was the first where a popular vote was used to determine the overall winner, approximately three percent of the U.S. population voted in the election, while only one percent actually voted for the winner. Over the following decades, restrictions that prevented non-property owning males from voting were gradually repealed, and almost all white men over the age of 21 could vote by the 1856 election. The next major development was the 15th Amendment to the U.S. Constitution following the American Civil War, which granted suffrage to all male citizens of voting age, regardless of race. Turnout then grew to almost twenty percent at the turn of the century, however Jim Crow laws played a large part in keeping these numbers lower than they potentially could have been, by disenfranchising black communities in the south and undoing much of the progress made during the Reconstruction Era. Extension of voting rights Female suffrage, granted to women in 1920, was responsible for the largest participation increase between any two elections in U.S. history. Between the 1916 and 1920 elections, overall turnout increased by almost seven percent, and it continued to grow to 38 percent by the 1940 election; largely due to the growth in female participation over time. Following a slight reduction during the Second World War and 1948 elections, turnout remained at between 36 and forty percent from the 1950s until the 1990s. Between these decades, the Voting Rights Act of 1965 and the Twenty-Sixth Amendment in 1971 respectively re-enfranchised many black voters in the south and reduced the voting age in all states from 21 to 18 years old. Participation among female voters has also exceeded male participation in all elections since 1980. Recent trends The 1992 election was the first where more than forty percent of the total population cast ballots, and turnout has been above forty percent in all presidential elections since 2004. Along with the extension of voting rights, the largest impact on voter turnout has been the increase in life expectancy throughout the centuries, almost doubling in the past 150 years. As the overall average age has risen, so too has the share of the total population who are eligible to vote, and older voters have had the highest turnout rates since the 1980s. Another factor is increased political involvement among ethnic minorities; while white voters have traditionally had the highest turnout rates in presidential elections, black voters turnout has exceeded the national average since 2008. Asian and Hispanic voter turnouts have also increased in the past twenty years, with the growing Hispanic vote in southern and border states expected to cause a major shift in U.S. politics in the coming decades.

In terms of the most popular presidents, in the 1940 election, Franklin D. Roosevelt became the first president to have been elected by more than one fifth of the total population. Three presidents were elected by more than 22 percent of the total population, respectively Lyndon B. Johnson in 1964, Richard Nixon in 1972 and Barack Obama in 2008, while Ronald Reagan's re-election in 1984 saw him become the only president in U.S. history to win with the support of more than 23 percent of the total population. While the vote count for the 2020 election is still to be finalized, President-elect Joe Biden has already received 81.28 million votes as of December 02, which would also translate to over 24.5 percent of the total population, and will likely near 25 percent by the end of the counting process.

Throughout United States history, voter turnout among the voting eligible population has varied, ranging from below twelve percent in uncontested elections, to 83 percent in the 1876 election. In early years, turnout in presidential elections was relatively low, as the popular vote was not used in every state to decide who electors would vote for. When this was changed in the 1824 election, turnout increased dramatically, and generally fluctuated between seventy and eighty percent during the second half of the nineteenth century. Until the 1840 and 1842 elections, midterm elections also had a higher turnout rate than their corresponding presidential elections, although this trend has been reversed since these years.

Declining turnout in the twentieth century An increase in voting rights, particularly for black males in 1870 and for women in 1920, has meant that the share of the total population who are legally eligible to vote has increased significantly; yet, as the number of people eligible to vote increased, the turnout rate generally decreased. Following enfranchisement, it would take over fifty years before the female voter turnout would reach the same level as males, and over 150 years before black voters would have a similar turnout rate to whites. A large part of this was simply the lack of a voting tradition among these voter bases; however, the Supreme Court and lawmakers across several states (especially in the south) created obstacles for black voters and actively enforced policies and practices that disenfranchised black voter participation. These practices were in place from the end of the Reconstruction era (1876) until the the Voting Rights Act of 1965 legally removed and prohibited many of these obstacles; nonetheless, people of color continue to be disproportionally affected by voting restrictions to this day.

Recent decades In 1971, the Twenty-sixth Amendment lowered the minimum voting age in most states from 21 to 18 years old, which greatly contributed to the six and eight percent reductions in voter turnout in the 1972 and 1974 elections respectively, highlighting a distinct correlation between age and voter participation. Overall turnout remained below sixty percent from the 1970s until the 2004 election, and around forty percent in the corresponding midterms. In recent elections, increased political involvement among younger voters and those from ethnic minority backgrounds has seen these numbers rise, with turnout in the 2018 midterms reaching fifty percent. This was the highest midterm turnout in over one hundred years, leading many at the time to predict that the 2020 election would see one of the largest and most diverse voter turnouts in the past century, although these predictions then reversed with the arival of the coronavirus (COVID-19) pandemic. However, 2020 did prove to have the highest turnout in any presidential election since 1900; largely as a result of mail-in voting, improved access to early voting, and increased activism among grassroots organizations promoting voter registration.

According to a November 2023 survey, motivation levels among 18 percent of Americans between the ages of 18 and 34 to vote in the 2024 presidential election has lessened compared to past elections, compared to only eight percent of voters between 35 and 49 years old.

According to exit polling in the 2020 Presidential Election in the United States, 62 percent of surveyed 18 to 29 year old voters reported voting for former Vice President Joe Biden. In the race to become the next president of the United States, 51 percent of voters aged 65 and older reported voting for incumbent President Donald Trump.

According to exit polling in ten key states of the 2024 presidential election in the United States, Donald Trump received the most support from men between the ages of 45 and 64. In comparison, 61 percent of women between the ages of 18 and 29 reported voting for Kamala Harris.

According to a 2023 survey of young adults in the United States, just over half of Americans between 18 and 24 years old were planning on voting in the 2024 presidential election. The likelihood among those between the ages of 25 and 34 was only slightly greater.

United States presidential elections are quadrennial elections that decide who will be the President and Vice President of the United States for the next four years. Voter turnout has ranged between 54 and 70 percent since 1964, with white voters having the highest voter turnout rate (particularly when those of Hispanic descent are excluded). In recent decades, turnout among black voters has got much closer to the national average, and in 2008 and 2012, the turnout among black voters was higher than the national average, exceeded only by non-Hispanic white voters; this has been attributed to Barack Obama's nomination as the Democratic nominee in these years, where he was the first African American candidate to run as a major party's nominee. Turnout among Asian and Hispanic voters is much lower than the national average, and turnout has even been below half of the national average in some elections. This has been attributed to a variety of factors, such as the absence of voting tradition in some communities or families, the concentration of Asian and Hispanic communities in urban (non-swing) areas, and a disproportionate number of young people (who are less likely to vote).

As of December 7, 2020, 66.7 percent of the eligible voting population in the United States voted in the 2020 presidential election. As of this date, voter turnout was highest in Minnesota, at 80 percent.

Traditionally in the United States, voters who identify as white have the highest turnout rate of all major ethnic groups. Since the 1976 election, less than half of all eligible white voters under the age of 25 have participated in presidential elections, even falling below one third in the 2000 election. The overall participation among white voters gradually decreased from 1964 to 1996, before rising again in recent decades, and has fluctuated between 71 and 56 percent. The difference between white voters in the 25 to 44 bracket and the overall white turnout was relatively small in the 1960s and 70s, but has increased in the past three decades as voters over the age of 65 have brought the average up considerably. In the 1960s, white voters over the age of 65 were statistically less likely to vote than those aged 25 to 64, however, older voters have consistently had the highest participation rate in presidential elections since the 1996 election, with the margin of difference increasing steadily.

In the 2020 presidential election, about 55 percent of voters aged between 18 and 29 participated in the election -- a significant increase from the previous election year, when about 44 percent of youths voted in the election. The highest youth turnout rate was in 1972, when 55.4 percent of voters between the ages of 18 and 29 voted in the election.

In U.S. presidential elections since 1964, voter turnout among male and female voters has changed gradually but significantly, with women consistently voting at a higher rate than men since the 1980 election. 67 percent of eligible female voters took part in the 1964 election, compared to 72 percent of male voters. This difference has been reversed in recent elections, where the share of women who voted has been larger than the share of men by around four percent since 2004.

This graph shows the percentage of votes of the 2016 presidential elections in the United States on November 9, 2016, by age. According to the exit polls, about 56 percent of voters aged 18 to 24 voted for Hillary Clinton.

The U.S. midterm elections are general elections that are held in four year intervals, approximately two years after each presidential election. Midterm elections are used to determine all 435 seats in the House of Representatives, approximately one third of all Senate seats, two thirds of state governors, and a variety of local and municipal positions. Midterm elections traditionally have a much lower turnout than presidential elections, with turnout among U.S. adults ranging between 38 and 56 percent, compared with a range between 54 and 70 percent in presidential elections. Since 1964, white voters have consistently had the highest turnout rate in midterm elections, particularly non-Hispanic whites. Black voters have been voting at a similar rate to the national average in the past decade; although it is still just one percent below the national average. Since records became available, Asian and Hispanic voters have traditionally voted at a much lower rate than black or white voters, and have consistently had turnout rates at approximately half of the national average. The 2018 midterm elections saw an unprecedented increase in voter turnout, with the national average increasing by over ten percent; the high turnout in this election has been characterized as a reaction to "Trump's America", and saw significant gains for the Democratic Party, particularly for candidates who were female, non-white or members of the LGBT community.

In 2022, an estimated 46.8 percent of eligible voters in the United States participated in the midterm elections. This is slightly lower than the previous midterm election held in 2018, but remains generally high for a midterm election year. Election turnout in the United States tends to be much higher for presidential elections.

Between 1964 and 2020, turnout among black voters in U.S. presidential elections fluctuated between 48 and 62 percent, with the highest turnouts coming in 2008 and 2012, when Barack Obama (the first African American candidate from a major party) was the Democratic candidate. Voter turnout has always been lowest among those under 25 years of age, although younger black voters did participate in high numbers in the 1960s, during the civil rights movement, and again in 2008, during Obama's first election campaign; young black voters also participated in higher numbers than white voters of the same age between 2000 and 2012.

In 1964, black voters over the age of 65 voted at a similar rate to those in the 18 to 24 bracket, however they have consistently had the highest turnout rates among black voters in recent years, overtaking voters in the 45 to 64 years bracket (whose voting rate has consistently been between 60 and 70 percent) in the 1996 election.

As the November 2020 presidential election in the United States grows closer, voters began choosing which Democrat will run against President Donald Trump through a series of primaries. While voter turnout in presidential primaries is generally lower than turnout in presidential elections, Montana had the highest voter turnout in primaries in 2020, with 45.7 percent of voters coming out to vote.

According to exit polling in ten key states of the 2024 presidential election in the United States, almost two-thirds of voters who had never attended college reported voting for Donald Trump. In comparison, a similar share of voters with advanced degrees reported voting for Kamala Harris.