In 2025, 772 US boys were named Kaysen, making it the 415th most common boys’ name of the year, up 182 places from #597 in 2024. That is 292 more than the 480 boys named Kaysen in 2024. Its best rank for boys was #415, reached in this year, 2025. That year also had the most boys given the name: 772. For comparison, it was #710 in 2015 and unranked in 1950.
Social Security card records list Kaysen in 28 years of the 146 from 1880 to 2025, starting in 1998 with 6 babies. In all, 7,075 US babies have been given the name, 6.1% of them girls and 94% boys. Its busiest decade was the 2020s, with 3,379 babies named Kaysen.
Over the 10 years from 2016 to 2025, 4,942 US boys were named Kaysen; the busiest of those years was 2025, with 772. In 2025 that was about 1 in 2,213 of the boys in SSA’s list for the year.
Among the states, Kaysen ranked highest in West Virginia in 2025, at #99 for boys there. It was in the top 100 in 1 state (counting DC). Related spellings in the SSA files include Kayson (15,487 babies since 1880), Kason (14,951 babies since 1880), Kasen (11,538 babies since 1880) and Kaison (7,198 babies since 1880). Rarer spellings such as Caycen and Kaiyzen are summarised on this page.