Colby vs Colsen
American parents have registered 58,155 Colbys since 1880, against 1,710 Colsens. But in 2025 it was Colsen that was commoner, 523 babies to 515.
Babies given each name, 1880–2025
Colby Colsen
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
Of the 111 years in which either name was published, Colby for 110 years and Colsen for 1 year. The lead changed hands once.
Side by side
| Colby | Colsen | |
|---|---|---|
| Total US births | 58,155 | 1,710 |
| Most in one year | 3,979 | 523 |
| Babies in 2025 | 515 | 523 |
| Estimated living today | 56,000 | 1,700 |
| Median age today | 24 | 1 |
| Peak year | 2001 | 2025 |
| Best rank | 99th boys | 566th boys |
| Rank in 2025 | 615th | 566th |
| First recorded | 1888 | 2001 |
| Girls / boys | 4,184 / 53,971 | 0 / 1,710 |
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 Colbys alive today are over 24; half the Colsens are over 1. That is 23 years between them: two names in use at the same time, worn by two different generations.
Where each one is strongest
- Colby Maine (4.3×), New Hampshire (4.2×), Utah (4.1×)
- Colsen Tennessee (3.4×), Arkansas (2.5×), Kentucky (2.5×)
How much commoner the name is in that state than it is nationally, from births recorded since 1910.
Compare something else
Related comparisons
Social Security Administration birth records, 1880–2025, public domain. Full histories: Colby and Colsen.