Total babies named Costello (all years): 66
| Year | Boys (count / rank / %) |
|---|---|
| 2021 | 5 / #12507 / 0.000% |
| 2012 | 5 / #12637 / 0.000% |
| 2009 | 5 / #12860 / 0.000% |
| 2007 | 7 / #9967 / 0.000% |
| 1975 | 5 / #5625 / 0.000% |
| 1974 | 6 / #4726 / 0.000% |
| 1957 | 6 / #3645 / 0.000% |
| 1954 | 6 / #3521 / 0.000% |
| 1951 | 11 / #2398 / 0.001% |
| 1942 | 5 / #3665 / 0.000% |
| Year | Boys (count / rank / %) |
|---|---|
| 1931 | — |