In 2025, 8,748 US boys were named Jack, making it the 15th most common boys’ name of the year, the same rank as in 2024. That is 276 more than the 8,472 boys named Jack in 2024. Its best rank for boys was #11, reached in 2021. The most boys given the name in a single year was 12,802, in 1927. For comparison, it was #40 in 2015 and #48 in 1950.
Social Security card records list Jack in every one of the 146 years from 1880 to 2025; in 1880 there were 204 babies with the name. In all, 759,677 US babies have been given the name, 0.4% of them girls and 99.6% boys. Its busiest decade was the 1920s, with 116,741 babies named Jack.
Over the 10 years from 2016 to 2025, 88,589 US boys were named Jack; the busiest of those years was 2021, with 9,568. In 2025 that was about 1 in 195 of the boys in SSA’s list for the year.
Among the states, Jack ranked highest in New Hampshire in 2025, at #4 for boys there. It was in the top 100 in 51 states (counting DC). Related spellings in the SSA files include John (5,204,377 babies since 1880), Joan (488,939 babies since 1880), Jean (483,475 babies since 1880) and Sean (426,606 babies since 1880). Rarer spellings such as Jock, Jaice and Jac are summarised on this page. The open nickname list we use links it to Jackie.