Dillian vs Dillon
American parents have registered 66,270 Dillons since 1880, against 610 Dillians. Dillon is still ahead, with 294 babies in 2025.
Babies given each name, 1880–2025
Dillian Dillon
Each line is every baby given the name that year, girls and boys added together — the only count that means the same thing for both names. A line breaks where the name fell below five babies in a year — the point at which the SSA stops publishing it — rather than being drawn through a figure nobody published. A single published year in a gap shows as a dot.
Who was ahead
Dillon has been the commoner name in every year either was published, 1892 to 2025. The lead has never changed hands.
The closest they came was 2014, when Dillian had 14 and Dillon had 823.
Side by side
| Dillian | Dillon | |
|---|---|---|
| Total US births | 610 | 66,270 |
| Most in one year | 41 | 5,082 |
| Babies in 2025 | under 5 | 294 |
| Estimated living today | 600 | 64,000 |
| Median age today | 25 | 27 |
| Peak year | 1992 | 1992 |
| Best rank | 1,955th boys | 73rd boys |
| Rank in 2025 | unranked | 929th |
| First recorded | 1989 | 1892 |
| Girls / boys | 0 / 610 | 1,045 / 65,225 |
A rank is a position within one sex’s list for one year, so the two rank rows are not subtracted from one another and the winning column is not marked on them. The living figure is a life-table estimate, not a count.
Which name is older
Half of the Dillons alive today are over 27; half the Dillians are over 25. That is 2 years between them: two names in use at the same time, worn by two different generations.
Compare something else
Related comparisons
Social Security Administration birth records, 1880–2025, public domain. Full histories: Dillian and Dillon.