In 2025, 18 US boys were named Kolin, making it the 5,318th most common boys’ name of the year, up 475 places from #5,793 in 2024. That is 2 more than the 16 boys named Kolin in 2024. Its best rank for boys was #1,575, reached in 1997. The most boys given the name in a single year was 79, in 2004. For comparison, it was #2,288 in 2015 and unranked in 1950.
Social Security card records list Kolin in 61 years of the 146 from 1880 to 2025, starting in 1955 with 5 babies. In all, 1,945 US babies have been given the name, all of them boys. Its busiest decade was the 2000s, with 651 babies named Kolin.
Over the 10 years from 2016 to 2025, 253 US boys were named Kolin; the busiest of those years was 2016, with 40. In 2025 that was about 1 in 94,893 of the boys in SSA’s list for the year.
Related spellings in the SSA files include Colin (134,151 babies since 1880), Collin (81,962 babies since 1880) and Kollin (2,782 babies since 1880). Rarer spellings such as Kolene are summarised on this page.