Fewer than five US girls were named Kierstin in 2025, so it does not appear in that year’s SSA list for girls. Its best rank for girls was #1,220, reached in 1995. The most girls given the name in a single year was 174, in 2005. For comparison, it was #7,819 in 2015 and unranked in 1950.
Social Security card records list Kierstin in 57 years of the 146 from 1880 to 2025, starting in 1966 with 6 babies. In all, 3,270 US babies have been given the name, all of them girls. Its busiest decade was the 2000s, with 1,243 babies named Kierstin.
Over the 10 years from 2016 to 2025, 78 US girls were named Kierstin; the busiest of those years was 2016, with 22.
Related spellings in the SSA files include Kirsten (53,393 babies since 1880), Kiersten (14,814 babies since 1880), Kirstin (8,778 babies since 1880) and Kerstin (2,537 babies since 1880).