In 2025, 185 US boys were named Cain, making it the 1,142nd most common boys’ name of the year, down 162 places from #980 in 2024. That is 45 fewer than the 230 boys named Cain in 2024. Its best rank for boys was #727, reached in 2014. That year also had the most boys given the name: 330. For comparison, it was #743 in 2015 and #3,064 in 1950.
Social Security card records list Cain in 89 years of the 146 from 1880 to 2025, starting in 1910 with 9 babies. In all, 7,628 US babies have been given the name, all of them boys. Its busiest decade was the 2010s, with 2,814 babies named Cain.
Over the 10 years from 2016 to 2025, 2,529 US boys were named Cain; the busiest of those years was 2016, with 324. In 2025 that was about 1 in 9,233 of the boys in SSA’s list for the year.
Among the states, Cain ranked highest in Louisiana in 2025, at #597 for boys there. It was not in the top 100 of any state. Related spellings in the SSA files include Kain (3,750 babies since 1880), Kaine (3,621 babies since 1880) and Caine (2,104 babies since 1880). Rarer spellings such as Kayin, Kaion and Kaian are summarised on this page.