In 2025, 950 US boys were named Colin, making it the 343rd most common boys’ name of the year, down 8 places from #335 in 2024. That is 88 fewer than the 1,038 boys named Colin in 2024. Its best rank for boys was #85, reached in 2004. That year also had the most boys given the name: 5,122. For comparison, it was #172 in 2015 and #476 in 1950.
Social Security card records list Colin in 135 years of the 146 from 1880 to 2025, starting in 1880 with 6 babies. In all, 134,151 US babies have been given the name, 0.3% of them girls and 99.6% boys. Its busiest decade was the 2000s, with 39,198 babies named Colin.
Over the 10 years from 2016 to 2025, 13,219 US boys were named Colin; the busiest of those years was 2016, with 2,052. In 2025 that was about 1 in 1,798 of the boys in SSA’s list for the year.
Among the states, Colin ranked highest in Massachusetts in 2025, at #92 for boys there. It was in the top 100 in 1 state (counting DC). Related spellings in the SSA files include Collin (81,962 babies since 1880), Coleen (11,998 babies since 1880), Kollin (2,782 babies since 1880) and Kolin (1,945 babies since 1880). Rarer spellings such as Colene, Colon and Colyn are summarised on this page.