Mitsuo
Mitsuo was last recorded in 1940, when 5 babies were given it; 521 Americans have been recorded with it between 1912 and 1940 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Mitsuo by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
How popular is Mitsuo?
Unranked in 2025
Its last boys’ rank on record is #3,788, in 1940; SSA lists a name only in years with 5 or more births.
40 babies in 1925, the peak
Mitsuo peaked in 1925, when 40 boys were given it, #1,115 among boys’ names. It was not recorded in 2025.
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 1940 | 5 | #3,788 | 4.3 |
| 1934 | 7 | #3,189 | 6.8 |
| 1933 | 10 | #2,485 | 10.1 |
| 1932 | 15 | #1,974 | 14.4 |
| 1931 | 16 | #1,901 | 15.4 |
| 1930 | 23 | #1,553 | 21.0 |
| 1929 | 28 | #1,367 | 26.0 |
| 1928 | 23 | #1,594 | 20.8 |
| 1927 | 34 | #1,262 | 30.2 |
| 1926 | 29 | #1,373 | 26.1 |
Every recorded year (24)
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 1925 | 40 | #1,115 | 35.8 |
| 1924 | 38 | #1,180 | 33.5 |
| 1923 | 26 | #1,482 | 23.7 |
| 1922 | 34 | #1,253 | 31.2 |
| 1921 | 31 | #1,351 | 28.1 |
| 1920 | 38 | #1,173 | 35.7 |
| 1919 | 24 | #1,517 | 24.5 |
| 1918 | 21 | #1,690 | 20.7 |
| 1917 | 24 | #1,469 | 25.9 |
| 1916 | 13 | #2,225 | 14.6 |
| 1915 | 19 | #1,642 | 22.4 |
| 1914 | 6 | #3,141 | 9.2 |
| 1913 | 6 | #2,696 | 11.7 |
| 1912 | 11 | #1,592 | 25.6 |
Ranks and shares: boys’ names in each year’s SSA file; share of all boys SSA recorded that year.
Is Mitsuo a boy’s or a girl’s name?
Mitsuo has been recorded only for boys: SSA lists no girls with the name in 24 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Mitsuo: the SSA national file counts each sex separately.
How many people are named Mitsuo, and how old are they?
An estimated 7 Americans named Mitsuo 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 234 people named Mitsuo (2 women and girls, 232 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 30 born in the U.S. The Census count is 7.8 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 Mitsuo born?
| State | Since 1910 | Rank, boys | vs. national |
|---|---|---|---|
| Hawaii | 350 | not ranked | 163.5× |
| California | 94 | not ranked | 5.6× |
Where Mitsuo is more common than its national share predicts
Relative to its national share, Mitsuo is most over-represented in Hawaii: since 1912 it was given 163.5 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 Mitsuo with the births its national share predicts year by year, for states with at least 100 births of the name.
Names that rose and fell in the same decades as Mitsuo
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 Mitsuo and names like it
- Compare Mitsuo and HiroshiBirths, ranks, peak and the living estimate side by side.
- The most given names of the 1920sMitsuo peaked in 1925.
- Hawaii’s most given namesThe state where SSA recorded the most babies named Mitsuo since 1910.
- The top names of 1925The year the most babies were named Mitsuo.
- Names starting with MMost given first.