In 2025, 63 US girls were named Katelynn, making it the 2,736th most common girls’ name of the year, down 442 places from #2,294 in 2024. That is 18 fewer than the 81 girls named Katelynn in 2024. Its best rank for girls was #210, reached in 1998. That year also had the most girls given the name: 1,457. For comparison, it was #652 in 2015 and unranked in 1950.
Social Security card records list Katelynn in 47 years of the 146 from 1880 to 2025, starting in 1979 with 5 babies. In all, 30,691 US babies have been given the name, all of them girls. Its busiest decade was the 2000s, with 12,199 babies named Katelynn.
Over the 10 years from 2016 to 2025, 1,340 US girls were named Katelynn; the busiest of those years was 2016, with 249. In 2025 that was about 1 in 25,512 of the girls in SSA’s list for the year.
Among the states, Katelynn ranked highest in Missouri in 2025, at #865 for girls there. It was not in the top 100 of any state. Related spellings in the SSA files include Katelyn (134,206 babies since 1880), Caitlin (112,426 babies since 1880), Caitlyn (52,637 babies since 1880) and Katelin (8,917 babies since 1880). Rarer spellings such as Catelynne are summarised on this page.