In 2025, 194 US boys were named Cullen, making it the 1,108th most common boys’ name of the year, up 19 places from #1,127 in 2024. That is 5 more than the 189 boys named Cullen in 2024. Its best rank for boys was #413, reached in 2010. That year also had the most boys given the name: 679. For comparison, it was #570 in 2015 and #1,832 in 1950.
Social Security card records list Cullen in 129 years of the 146 from 1880 to 2025, starting in 1880 with 9 babies. In all, 16,703 US babies have been given the name, 0.7% of them girls and 99% boys. Its busiest decade was the 2010s, with 5,105 babies named Cullen.
Over the 10 years from 2016 to 2025, 3,532 US boys were named Cullen; the busiest of those years was 2017, with 556. In 2025 that was about 1 in 8,805 of the boys in SSA’s list for the year.
Among the states, Cullen ranked highest in Louisiana in 2025, at #460 for boys there. It was not in the top 100 of any state. Related spellings in the SSA files include Colleen (163,084 babies since 1880), Collin (81,962 babies since 1880) and Coleen (11,998 babies since 1880). Rarer spellings such as Kullen, Quillen and Qualen are summarised on this page.