Cay is a very rare girls' name that was most common in the 1950s and has all but disappeared.
Cay is predominantly a girl name. It last appears in U.S. records in 1966. Cay first appears in 1919 and peaked in 1955 (38 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 1966 | 5 | — | #6,697 | — |
| 1965 | 7 | — | #5,354 | — |
| 1963 | 10 | — | #4,298 | — |
| 1962 | 8 | — | #4,921 | — |
| 1961 | 8 | — | #4,947 | — |
| 1960 | 19 | — | #2,827 | — |
| 1959 | 14 | — | #3,279 | — |
| 1958 | 12 | — | #3,570 | — |
| 1957 | 12 | — | #3,507 | — |
| 1956 | 23 | — | #2,328 | — |
| 1955 | 38 | — | #1,670 | — |
| 1954 | 23 | — | #2,247 | — |
| 1953 | 6 | — | #5,121 | — |
| 1952 | 8 | — | #4,177 | — |
| 1950 | 7 | — | #4,376 | — |
| 1948 | 9 | — | #3,631 | — |
| 1946 | 7 | — | #4,046 | — |
| 1945 | 6 | — | #4,093 | — |
| 1943 | 12 | — | #2,723 | — |
| 1939 | 7 | — | #3,482 | — |
| 1927 | 5 | — | — | #4,293 |
| 1919 | 6 | — | — | #3,802 |