Each headline number on this site as one sentence you can cite, with the population it describes, its period and its primary source. Download them all as CSV or JSON.
September 12 is the most common birthday in the United States: 191,024 births from 2000 to 2014, about 1 in 326.
December 25 has the fewest births of any date that comes every year: 96,568 U.S. births from 2000 to 2014, about 1 in 644.
February 29, which comes once every four years, had 41,869 U.S. births from 2000 to 2014, about 1 in 1,485.
In a group of 23 people there is a 50.8% chance that two share a birthday, using real U.S. birth frequencies rather than 365 equal days.
August had the most U.S. births per day in 2024: 10,506 a day.
January had the fewest U.S. births per day in 2024: 9,581 a day.
Tuesday was the busiest day of the week for U.S. births in 2024, with 11,129 births on an average Tuesday.
Over 2000 to 2014, September had the most U.S. births per day: 11,999 a day. January had the fewest.
Capricorn is the rarest zodiac sign among U.S. births: 7.63% of births from 2000 to 2014.
Leo is the most common zodiac sign among U.S. births: 8.99% of births from 2000 to 2014.
Michael is the most common first name among living Americans: about 3.6 million people, estimated from Social Security birth records and survival rates.
Mary is the most common woman’s name among living Americans: about 1.7 million people.
James has been given to more U.S. babies than any other name since 1880: 5,250,638 boys.
Olivia was the most popular girls’ name in the United States in 2025: 13,544 girls.
Liam was the most popular boys’ name in the United States in 2025: 20,818 boys.
Flavia has been given to girls every year since 1926 but never to more than 30 in a year: 1,351 girls in all.
Basilio has been given to boys every year since 1926 but never to more than 28 in a year: 1,613 boys in all.
Smith is the most common last name in the United States: 2,442,977 people in the 2010 Census.
The 10 most common last names cover 4.9% of people with a recorded surname in the 2010 Census.
The Census Bureau published 162,253 last names shared by at least 100 people in 2010; 1,279 of them were shared by exactly 100, the rarest it lists.
AB negative is the rarest of the eight main blood types in the United States: 0.6% of people, about 1 in 167.
B negative is the second-rarest blood type in the United States: 1.5% of people.
O positive is the most common blood type in the United States: 37.4% of people.
O negative, the type whose red cells suit every ABO and RhD type, is 6.6% of people in the United States.
AB positive can receive red cells from all eight main ABO and RhD blood types.
O negative can receive red cells only from O negative.
Gray is the rarest eye color on U.S. driver’s licenses: 0.7% of 235 million licenses.
Brown or black is the most common eye color on U.S. driver’s licenses: 53% of them.
Green eyes are listed on 9% of U.S. driver’s licenses, blue on 23.7% and hazel on 10.3%.
Heterochromia, two different eye colors, appeared in 0.063% of 11,111 portraits of U.S. Military Academy cadets.
In a YouGov poll of 1,000 U.S. adults in May 2023, 4% said their eyes are amber.
The average U.S. man age 20 and over is 175.1 cm (5 ft 8.9 in) tall.
The average U.S. woman age 20 and over is 161.2 cm (5 ft 3.5 in) tall.
About 15% of U.S. men age 20 and over are 6 feet (182.9 cm) or taller.
The average U.S. man age 20 and over weighs 199.0 lb (90.3 kg).
The average U.S. woman age 20 and over weighs 171.8 lb (77.9 kg), not counting pregnant women.
About 10.6% of people are left-handed, the best overall estimate from 200 studies of 2,396,170 people.
About 2.3% of 1,641,059 people in UK Biobank and 23andMe said they were ambidextrous.
About 1 in 33 U.S. babies born in 2024 was a twin: 109,195 babies.
About 1 in 1,485 U.S. babies born in 2024 was a triplet: 2,444 babies.
The median U.S. family had a net worth of $192,700 in 2022.
18.0% of U.S. families had a net worth of $1 million or more in 2022.
A U.S. family needed about $13.6 million in net worth to be in the top 1% in 2022.
The median U.S. household income was $87,390 in 2025.
A U.S. household needed $704,570 of income in 2025 to be in the top 1%.
The median income of Americans with income was $46,950 in 2025.
A person needed $437,440 of income in 2025 to be in the top 1% of Americans with income.
The median income of full-time, year-round U.S. workers was $70,970 in 2025.
About 1 in 100 U.S. men age 18 and over is aged 25 to 34, single, with a bachelor’s degree or more and $100,000 or more in personal income: about 1.3 million men.
The most common occupation in the United States is home health and personal care aides: 4,305,810 workers in May 2025, 1 in 36 jobs.
The rarest single occupation the Bureau of Labor Statistics lists is patternmakers, wood: about 220 workers in May 2025.
78.3% of U.S. residents age 5 and over speak only English at home.
Spanish is the most common language at home after English: 41.2 million U.S. residents age 5 and over, 13.3%.
Chinese, counting Mandarin and Cantonese, is spoken at home by 3.5 million U.S. residents age 5 and over.
California has the largest share of residents who speak a language other than English at home: 43.8% of 37,110,000 residents age 5 and over.
West Virginia has the smallest share of residents who speak a language other than English at home: 2.5%.
The 1909-S VDB has the lowest mintage of any Lincoln cent made for circulation: 484,000.
The Mint made 1,093,838,670 zinc-coated steel cents in 1943.
The Mint made about 560 billion Lincoln cents for circulation from 1909 to 2025, when the last were struck.
A penny cost 3.02 cents to make in the Mint’s 2025 fiscal year.
A quarter cost 14.53 cents to make in the Mint’s 2025 fiscal year.
The 1932-S has the lowest mintage of any Washington quarter made for circulation: 408,000.
The 2019-W quarters, the first with a W mint mark, are the scarcest since 1965: 2,000,000 of each of the five designs.
The Mint made 1,669,902,839 Bicentennial quarters, dated 1776–1976, for circulation.
The Ford Fiesta is the most common car model group in UK licensing records: 1,259,187 licensed on 30 June 2026, 3.61% of licensed cars.
The Tesla Model Y is the most common plug-in vehicle registered in Washington State: 66,545 of 299,705, about 1 in 5.
Luna is the most common dog name in New York City’s dog-license records: 1,177 of 96,459 license-period records in the 2026 extract.
The 34 tables behind the pages, each a CSV with its source and period. Each dataset page explains its own method.
Name the primary source given with the fact, and link the page that states it: that page explains the calculation and its limits. Each fact links to its own place on this page, too.
Every sentence here is written by the same code, from the same data files, as the page it comes from, so the two cannot disagree. When a page's data changes, its facts here change with it. The methodology has the rules for each dataset.