Osa
Osa was given to 9 girls in 2025, #10,709 among girls’ names; 770 Americans have been recorded with it since 1880 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Osa by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
How popular is Osa?
#10,709 among girls’ names, 2025
Osa entered the girls’ rankings after 2015 and stood at #10,709 in 2025.
28 babies in 1918, the peak
Osa peaked in 1918, when 28 babies were given it (21 girls, #1,865 among girls’ names). The 9 births of 2025 are 32% of that peak.
Births by sex.
| Year | Girls | Girls’ rank | Boys | Boys’ rank |
|---|---|---|---|---|
| 2025 | 9 | #10,709 | under 5 | |
| 2024 | 6 | #14,846 | under 5 | |
| 2023 | 5 | #16,995 | under 5 | |
| 2021 | 5 | #17,053 | under 5 | |
| 2019 | 5 | #17,362 | under 5 | |
| 2017 | 6 | #15,455 | 5 | #13,724 |
| 2011 | 6 | #16,271 | under 5 | |
| 1964 | 5 | #7,498 | under 5 | |
| 1950 | 8 | #4,223 | under 5 | |
| 1948 | 5 | #5,815 | under 5 |
Every recorded year (68)
| Year | Girls | Girls’ rank | Boys | Boys’ rank |
|---|---|---|---|---|
| 1947 | 8 | #4,246 | under 5 | |
| 1946 | 8 | #3,901 | under 5 | |
| 1941 | 5 | #4,903 | under 5 | |
| 1940 | 5 | #4,868 | under 5 | |
| 1939 | 9 | #3,089 | under 5 | |
| 1937 | 13 | #2,419 | under 5 | |
| 1936 | 6 | #4,045 | under 5 | |
| 1935 | 8 | #3,361 | under 5 | |
| 1931 | 8 | #3,417 | under 5 | |
| 1930 | 13 | #2,529 | 5 | #4,406 |
| 1929 | 5 | #5,118 | 7 | #3,460 |
| 1928 | 5 | #5,260 | 7 | #3,616 |
| 1927 | 8 | #3,788 | under 5 | |
| 1926 | 7 | #4,213 | under 5 | |
| 1925 | 12 | #2,897 | 5 | #4,725 |
| 1924 | 7 | #4,341 | under 5 | |
| 1923 | 18 | #2,145 | under 5 | |
| 1922 | 15 | #2,458 | under 5 | |
| 1921 | 15 | #2,473 | 10 | #2,928 |
| 1920 | 16 | #2,340 | 9 | #3,148 |
| 1919 | 12 | #2,768 | 5 | #4,638 |
| 1918 | 21 | #1,865 | 7 | #3,615 |
| 1917 | 16 | #2,181 | 5 | #4,422 |
| 1916 | 11 | #2,790 | 10 | #2,684 |
| 1915 | 17 | #1,938 | 7 | #3,310 |
| 1914 | 6 | #3,507 | 5 | #3,619 |
| 1913 | 9 | #2,291 | under 5 | |
| 1911 | 7 | #2,140 | under 5 | |
| 1910 | 5 | #2,697 | under 5 | |
| 1909 | 8 | #1,720 | under 5 | |
| 1908 | 8 | #1,646 | under 5 | |
| 1907 | 12 | #1,194 | under 5 | |
| 1906 | 18 | #889 | under 5 | |
| 1904 | 17 | #901 | under 5 | |
| 1903 | 12 | #1,065 | under 5 | |
| 1902 | 11 | #1,118 | under 5 | |
| 1901 | 10 | #1,118 | under 5 | |
| 1900 | 13 | #1,092 | under 5 | |
| 1899 | 17 | #812 | under 5 | |
| 1898 | 8 | #1,353 | under 5 | |
| 1897 | 11 | #1,022 | under 5 | |
| 1896 | 10 | #1,105 | under 5 | |
| 1895 | 12 | #972 | under 5 | |
| 1894 | 16 | #774 | under 5 | |
| 1893 | 15 | #786 | under 5 | |
| 1892 | 21 | #633 | under 5 | |
| 1891 | 17 | #659 | under 5 | |
| 1890 | 12 | #816 | under 5 | |
| 1889 | 7 | #1,113 | under 5 | |
| 1888 | 10 | #878 | under 5 | |
| 1887 | 7 | #1,014 | under 5 | |
| 1886 | 11 | #723 | under 5 | |
| 1885 | 5 | #1,162 | under 5 | |
| 1884 | 8 | #836 | under 5 | |
| 1883 | 8 | #744 | under 5 | |
| 1882 | 8 | #721 | under 5 | |
| 1881 | 9 | #615 | under 5 | |
| 1880 | 7 | #723 | under 5 |
Ranks: girls’ names and boys’ names ranked separately in each year’s SSA file; “under 5” is a year SSA did not list the name for that sex.
Is Osa a boy’s or a girl’s name?
Of the 770 Americans recorded as Osa, 89% are girls and 11% boys. In 2025 it went to 9 girls; SSA lists no boys with it that year (fewer than 5, or none).
Years with fewer than 20 babies given the name are left blank.
Girls and boys named Osa: the SSA national file counts each sex separately.
How many people are named Osa, and how old are they?
An estimated 89 Americans named Osa and born in the U.S. are alive in 2026, too few to state an age range. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 405 people named Osa (255 women and girls, 150 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 91 born in the U.S. The Census count is 4.5 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).
Names spelled alike
Of these 2 names spelled alike, given to 2,872 babies since 1880, Osa is the second most given (27% of them).
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 Osa
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 Osa and names like it
- Compare Osa and OsieBirths, ranks, peak and the living estimate side by side.
- The most given names of the 1910sOsa peaked in 1918.
- Tennessee’s most given namesThe state where SSA recorded the most babies named Osa since 1910.
- The top names of 1918The year the most babies were named Osa.
- Names starting with OMost given first.