The baby name Hiroko appears in baby name data for the United States from 1919 to 1935. It was most popular in 1919 with 24 babies given the name.
Over the period shown, Hiroko has stayed at a similar level of popularity.
| Year | Count |
|---|---|
| 1919 | 24 |
| 1921 | 12 |
| 1923 | 14 |
| 1924 | 10 |
| 1925 | 12 |
| 1926 | 14 |
| 1929 | 10 |
| 1931 | 12 |
| 1932 | 16 |
| 1935 | 12 |