In 2025, 126 US girls were named Kaylin, making it the 1,644th most common girls’ name of the year, down 216 places from #1,428 in 2024. That is 30 fewer than the 156 girls named Kaylin in 2024. Its best rank for girls was #371, reached in 2009. The most girls given the name in a single year was 869, in 2008. For comparison, it was #620 in 2015 and unranked in 1950.
Social Security card records list Kaylin in 64 years of the 146 from 1880 to 2025, starting in 1953 with 5 babies. In all, 19,934 US babies have been given the name, 97% of them girls and 3.1% boys. Its busiest decade was the 2000s, with 7,560 babies named Kaylin.
Over the 10 years from 2016 to 2025, 2,226 US girls were named Kaylin; the busiest of those years was 2016, with 357. In 2025 that was about 1 in 12,756 of the girls in SSA’s list for the year.
Among the states, Kaylin ranked highest in Louisiana in 2025, at #840 for girls there. It was not in the top 100 of any state. Related spellings in the SSA files include Kaelyn (15,648 babies since 1880), Kailyn (14,351 babies since 1880), Kaylynn (12,257 babies since 1880) and Kaylyn (12,091 babies since 1880). Rarer spellings such as Calin, Kalon and Kaelen are summarised on this page.