Naoko is a very rare girls' name that was most common in the 1980s and has all but disappeared.
Naoko is a girl name. It last appears in U.S. records in 1993. Naoko first appears in 1977 and peaked in 1982 (9 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 1993 | 7 | — | #11,389 |
| 1992 | 6 | — | #12,844 |
| 1990 | 6 | — | #12,410 |
| 1988 | 5 | — | #13,202 |
| 1986 | 5 | — | #12,183 |
| 1983 | 6 | — | #9,821 |
| 1982 | 9 | — | #7,281 |
| 1981 | 5 | — | #11,550 |
| 1980 | 6 | — | #9,936 |
| 1979 | 7 | — | #8,666 |
| 1977 | 5 | — | #10,706 |