Cosimo
Cosimo was given to 16 boys in 2025, #5,652 among boys’ names; 1,016 Americans have been recorded with it since 1911 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Cosimo by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
What does Cosimo mean?
Wiktionary, Italian section
Cosimo is “a male given name, equivalent to English Cosmo”
From Ancient Greek Κοσμᾶς (Kosmâs). Compare Sicilian Còcimu and Còsimu.
/ˈkɔ.si.mo/
Meaning: Wiktionary, Italian section, as of Sep 25, 2026 (CC BY‑SA 4.0).
How popular is Cosimo?
#5,652 among boys’ names, 2025
Cosimo rose from #8,166 in 2015 to #5,652 in 2025 among boys’ names; its share of boys born rose from 4.7 to 9.4 per million.
30 babies in 1927, the peak
Cosimo peaked in 1927, when 30 boys were given it, #1,354 among boys’ names. The 16 births of 2025 are 53% of that peak.
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 2025 | 16 | #5,652 | 9.4 |
| 2024 | 19 | #5,100 | 11.0 |
| 2023 | 18 | #5,284 | 10.5 |
| 2022 | 12 | #6,902 | 6.9 |
| 2021 | 10 | #7,713 | 5.7 |
| 2020 | 10 | #7,621 | 5.8 |
| 2019 | 14 | #6,157 | 7.8 |
| 2018 | 14 | #6,091 | 7.7 |
| 2017 | 15 | #5,850 | 8.1 |
| 2016 | 6 | #10,994 | 3.2 |
Every recorded year (95)
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 2015 | 9 | #8,166 | 4.7 |
| 2014 | 5 | #12,441 | 2.6 |
| 2011 | 8 | #8,910 | 4.2 |
| 2010 | 9 | #8,272 | 4.7 |
| 2009 | 12 | #6,879 | 6.0 |
| 2008 | 10 | #7,796 | 4.9 |
| 2007 | 7 | #9,960 | 3.4 |
| 2006 | 6 | #10,924 | 2.9 |
| 2005 | 10 | #7,210 | 5.0 |
| 2004 | 5 | #11,683 | 2.5 |
| 2003 | 7 | #8,825 | 3.5 |
| 2001 | 5 | #10,887 | 2.6 |
| 2000 | 6 | #9,292 | 3.1 |
| 1999 | 7 | #8,007 | 3.6 |
| 1995 | 5 | #9,106 | 2.6 |
| 1994 | 5 | #9,049 | 2.6 |
| 1993 | 8 | #6,308 | 4.1 |
| 1992 | 6 | #7,592 | 3.0 |
| 1991 | 6 | #7,441 | 3.0 |
| 1988 | 8 | #5,279 | 4.2 |
| 1987 | 8 | #5,050 | 4.3 |
| 1983 | 7 | #5,026 | 3.9 |
| 1982 | 7 | #5,119 | 3.9 |
| 1981 | 6 | #5,636 | 3.3 |
| 1980 | 14 | #3,126 | 7.8 |
| 1977 | 7 | #4,686 | 4.3 |
| 1976 | 5 | #5,762 | 3.2 |
| 1975 | 8 | #4,016 | 5.1 |
| 1974 | 5 | #5,361 | 3.2 |
| 1972 | 7 | #4,051 | 4.3 |
| 1970 | 8 | #3,574 | 4.3 |
| 1969 | 10 | #2,899 | 5.6 |
| 1968 | 10 | #2,765 | 5.8 |
| 1967 | 9 | #2,810 | 5.2 |
| 1966 | 11 | #2,499 | 6.2 |
| 1964 | 6 | #3,677 | 3.0 |
| 1963 | 11 | #2,560 | 5.4 |
| 1962 | 5 | #4,161 | 2.4 |
| 1959 | 10 | #2,686 | 4.7 |
| 1957 | 7 | #3,300 | 3.2 |
| 1956 | 6 | #3,602 | 2.8 |
| 1955 | 8 | #3,014 | 3.9 |
| 1954 | 8 | #2,999 | 3.9 |
| 1953 | 8 | #2,955 | 4.1 |
| 1952 | 5 | #3,836 | 2.6 |
| 1951 | 9 | #2,699 | 4.8 |
| 1950 | 9 | #2,613 | 5.0 |
| 1949 | 9 | #2,648 | 5.1 |
| 1948 | 8 | #2,824 | 4.6 |
| 1947 | 11 | #2,393 | 6.0 |
| 1946 | 12 | #2,171 | 7.4 |
| 1945 | 8 | #2,603 | 5.9 |
| 1944 | 13 | #2,008 | 9.5 |
| 1943 | 7 | #3,008 | 4.9 |
| 1942 | 5 | #3,661 | 3.6 |
| 1941 | 9 | #2,515 | 7.3 |
| 1940 | 10 | #2,357 | 8.6 |
| 1938 | 11 | #2,215 | 9.9 |
| 1937 | 5 | #3,623 | 4.7 |
| 1936 | 7 | #2,927 | 6.7 |
| 1935 | 8 | #2,752 | 7.7 |
| 1934 | 10 | #2,427 | 9.7 |
| 1933 | 8 | #2,785 | 8.1 |
| 1932 | 11 | #2,352 | 10.5 |
| 1931 | 9 | #2,696 | 8.7 |
| 1930 | 22 | #1,567 | 20.0 |
| 1929 | 25 | #1,450 | 23.2 |
| 1928 | 17 | #1,918 | 15.3 |
| 1927 | 30 | #1,354 | 26.6 |
| 1926 | 20 | #1,739 | 18.0 |
| 1925 | 15 | #2,108 | 13.4 |
| 1924 | 25 | #1,542 | 22.1 |
| 1923 | 27 | #1,433 | 24.6 |
| 1922 | 23 | #1,599 | 21.1 |
| 1921 | 17 | #1,996 | 15.4 |
| 1920 | 19 | #1,835 | 17.9 |
| 1919 | 13 | #2,288 | 13.3 |
| 1918 | 22 | #1,609 | 21.7 |
| 1917 | 22 | #1,541 | 23.8 |
| 1916 | 15 | #1,975 | 16.9 |
| 1915 | 17 | #1,718 | 20.0 |
| 1914 | 15 | #1,619 | 22.9 |
| 1913 | 8 | #2,127 | 15.6 |
| 1912 | 6 | #2,336 | 14.0 |
| 1911 | 5 | #1,793 | 22.1 |
Ranks and shares: boys’ names in each year’s SSA file; share of all boys SSA recorded that year.
Is Cosimo a boy’s or a girl’s name?
Cosimo has been recorded only for boys: SSA lists no girls with the name in 95 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Cosimo: the SSA national file counts each sex separately.
How many people are named Cosimo, and how old are they?
An estimated 496 Americans named Cosimo and born in the U.S. are alive in 2026 (49% of everyone recorded); the median is 33 years old and half are between 9 and 59. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 779 people named Cosimo (2 women and girls, 777 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 463 born in the U.S. The Census count is 1.7 times that prediction. Possible reasons: the Census counts people born abroad, whom SSA’s files leave out, and it records the name people give, which SSA may have recorded under another spelling or as part of a compound name.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made. Count: Census Bureau, first names in the 2020 Census (released April 14, 2026; names reported 100 or more times, with the Bureau’s disclosure-avoidance adjustment).
Where are babies named Cosimo born?
The states with the most babies named Cosimo are New York, Pennsylvania and New Jersey, with 93% of its births recorded by state since 1910; New Jersey is not among the ten states with the most births.
| State | Since 1910 | Rank, boys | vs. national |
|---|---|---|---|
| New York | 191 | not ranked | 2.3× |
| Pennsylvania | 30 | not ranked | 0.5× |
| New Jersey | 20 | not ranked | 0.7× |
| California | 17 | not ranked | 0.2× |
Where Cosimo is more common than its national share predicts
Relative to its national share, Cosimo is most over-represented in New York: since 1911 it was given 2.3 times as often there as its national share each year would predict.
States: SSA state file, 1910-2025, published May 8, 2026; births count girls and boys together, and the rank is among boys’ names in the state in 2025. The file leaves out any state and year with fewer than 5 babies of the name, so small states are undercounted; each ratio compares the state’s births of Cosimo with the births its national share predicts year by year, for states with at least 100 births of the name.
Names spelled alike
Of these 3 names spelled alike, given to 5,344 babies since 1880, Cosimo is the third most given (19% of them). In 2025 it was given to 16 of their 108 babies (15%), the second most given that year.
Spelled alike: names in the SSA national file with the same pattern of letters and sounds and at most two letters apart, and Wiktionary’s listed forms; births since 1880 and in 2025, and each name’s peak year, from the SSA national file, published May 8, 2026. Some are separate names, not spellings of one.
Names that rose and fell in the same decades as Cosimo
Names whose births rose and fell across the same decades, measured on each decade’s share of births.
Similar histories: each decade’s share of births, from the SSA national file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
More about Cosimo and names like it
- Compare Cosimo and CosmoBirths, ranks, peak and the living estimate side by side.
- The most given names of the 1920sCosimo peaked in 1927.
- New York’s most given namesThe state where SSA recorded the most babies named Cosimo since 1910.
- Italian namesWiktionary’s origin for Cosimo: every such name, by how often it is given.
- The top names of 1927The year the most babies were named Cosimo.
- The names of Generation AlphaMost people named Cosimo alive today were born 2013-2025.
- Names starting with CMost given first.