Kier vs Kierstin
American parents have registered 3,270 Kierstins since 1880, against 500 Kiers. But in 2025 it was Kier that was commoner, 5 babies to fewer than five.
Babies given each name, 1880–2025
Kier Kierstin
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 63 years in which either name was published, Kierstin for 50 years and Kier for 13 years. The lead changed hands 8 times.
Side by side
| Kier | Kierstin | |
|---|---|---|
| Total US births | 500 | 3,270 |
| Most in one year | 22 | 174 |
| Babies in 2025 | 5 | under 5 |
| Estimated living today | 480 | 3,200 |
| Median age today | 28 | 26 |
| Peak year | 1995 | 2005 |
| Best rank | 3,100th boys | 1,281st girls |
| Rank in 2025 | 12,008th | unranked |
| First recorded | 1963 | 1966 |
| Girls / boys | 11 / 489 | 3,270 / 0 |
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 Kiers alive today are over 28; half the Kierstins are over 26. 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: Kier and Kierstin.