Dempsy is a very rare boys' name that was most common in the 1910s and has all but disappeared.
Dempsy is a boy name. It last appears in U.S. records in 1945. Dempsy first appears in 1916 and peaked in 1919 (15 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 1945 | 7 | — | #2,810 |
| 1944 | 7 | — | #2,931 |
| 1939 | 6 | — | #3,195 |
| 1933 | 7 | — | #3,077 |
| 1928 | 10 | — | #2,701 |
| 1927 | 10 | — | #2,747 |
| 1926 | 11 | — | #2,610 |
| 1924 | 6 | — | #3,990 |
| 1923 | 6 | — | #3,925 |
| 1922 | 10 | — | #2,852 |
| 1921 | 5 | — | #4,504 |
| 1920 | 8 | — | #3,279 |
| 1919 | 15 | — | #2,081 |
| 1917 | 6 | — | #3,647 |
| 1916 | 5 | — | #4,060 |