Kazuko is a rare girls' name that was most common in the 1920s and has all but disappeared.
Kazuko is a girl name. It last appears in U.S. records in 1945. Kazuko first appears in 1915 and peaked in 1927 (63 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 1945 | 5 | — | #4,901 |
| 1944 | 6 | — | #4,295 |
| 1942 | 5 | — | #4,985 |
| 1941 | 6 | — | #4,193 |
| 1938 | 11 | — | #2,662 |
| 1937 | 8 | — | #3,299 |
| 1935 | 12 | — | #2,501 |
| 1934 | 8 | — | #3,313 |
| 1933 | 13 | — | #2,333 |
| 1932 | 21 | — | #1,724 |
| 1931 | 19 | — | #1,833 |
| 1930 | 14 | — | #2,370 |
| 1929 | 20 | — | #1,857 |
| 1928 | 28 | — | #1,524 |
| 1927 | 63 | — | #958 |
| 1926 | 14 | — | #2,526 |
| 1925 | 15 | — | #2,437 |
| 1924 | 16 | — | #2,368 |
| 1923 | 20 | — | #1,985 |
| 1922 | 14 | — | #2,548 |
| 1921 | 11 | — | #3,042 |
| 1920 | 13 | — | #2,666 |
| 1919 | 17 | — | #2,117 |
| 1918 | 21 | — | #1,844 |
| 1917 | 5 | — | #4,947 |
| 1916 | 8 | — | #3,414 |
| 1915 | 5 | — | #4,613 |