Mitsuo is a rare boys' name that was most common in the 1920s and has all but disappeared.
Mitsuo is a boy name. It last appears in U.S. records in 1940. Mitsuo was first reported in SSA data in 1912 and peaked in 1925 (40 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 1940 | 5 | — | #3,789 |
| 1934 | 7 | — | #3,190 |
| 1933 | 10 | — | #2,486 |
| 1932 | 15 | — | #1,974 |
| 1931 | 16 | — | #1,901 |
| 1930 | 23 | — | #1,553 |
| 1929 | 28 | — | #1,367 |
| 1928 | 23 | — | #1,594 |
| 1927 | 34 | — | #1,262 |
| 1926 | 29 | — | #1,373 |
| 1925 | 40 | — | #1,115 |
| 1924 | 38 | — | #1,180 |
| 1923 | 26 | — | #1,482 |
| 1922 | 34 | — | #1,253 |
| 1921 | 31 | — | #1,351 |
| 1920 | 38 | — | #1,173 |
| 1919 | 24 | — | #1,518 |
| 1918 | 21 | — | #1,691 |
| 1917 | 24 | — | #1,469 |
| 1916 | 13 | — | #2,226 |
| 1915 | 19 | — | #1,643 |
| 1914 | 6 | — | #3,142 |
| 1913 | 6 | — | #2,697 |
| 1912 | 11 | — | #1,593 |