Tonga is a very rare girls' name that was most common in the 1960s and has all but disappeared.
Tonga is a girl name. It last appears in U.S. records in 1986. Tonga was first reported in SSA data in 1953 and peaked in 1968 (17 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 1986 | 5 | — | #12,727 |
| 1975 | 7 | — | #7,931 |
| 1973 | 6 | — | #8,358 |
| 1972 | 6 | — | #8,209 |
| 1971 | 9 | — | #5,971 |
| 1970 | 13 | — | #4,476 |
| 1969 | 17 | — | #3,449 |
| 1968 | 17 | — | #3,302 |
| 1967 | 11 | — | #4,281 |
| 1966 | 10 | — | #4,465 |
| 1965 | 12 | — | #3,935 |
| 1963 | 10 | — | #4,517 |
| 1962 | 8 | — | #5,261 |
| 1961 | 8 | — | #5,270 |
| 1960 | 7 | — | #5,656 |
| 1958 | 6 | — | #6,053 |
| 1953 | 7 | — | #4,987 |