In 2025, 150 US boys were named Kallen, making it the 1,302nd most common boys’ name of the year, up 176 places from #1,478 in 2024. That is 27 more than the 123 boys named Kallen in 2024. Its best rank for boys was #1,178, reached in 2014. That year also had the most boys given the name: 159. For comparison, it was #1,242 in 2015 and unranked in 1950.
In 2025, 8 US girls were named Kallen, making it the 11,394th most common girls’ name of the year, down 2,163 places from #9,231 in 2024. That is 3 fewer than the 11 girls named Kallen in 2024. Its best rank for girls was #6,323, reached in 1997. That year also had the most girls given the name: 15. For comparison, it was #9,790 in 2015 and unranked in 1950.
Social Security card records list Kallen in 45 years of the 146 from 1880 to 2025, starting in 1963 with 6 babies. In all, 3,103 US babies have been given the name, 12% of them girls and 88% boys. Its busiest decade was the 2010s, with 1,383 babies named Kallen.
Over the 10 years from 2016 to 2025, 1,351 US boys were named Kallen; the busiest of those years was 2025, with 150. In 2025 that was about 1 in 11,387 of the boys in SSA’s list for the year.
Among the states, Kallen ranked highest in Wisconsin in 2025, at #544 for boys there. It was not in the top 100 of any state. Related spellings in the SSA files include Kaylin (19,934 babies since 1880), Kaelyn (15,648 babies since 1880), Kailyn (14,351 babies since 1880) and Callan (12,634 babies since 1880).