In 2025, 961 US boys were named Jax, making it the 342nd most common boys’ name of the year, down 29 places from #313 in 2024. That is 134 fewer than the 1,095 boys named Jax in 2024. Its best rank for boys was #208, reached in 2014. The most boys given the name in a single year was 1,865, in 2015. For comparison, it was #215 in 2015 and unranked in 1950.
Social Security card records list Jax in 31 years of the 146 from 1880 to 2025, starting in 1995 with 5 babies. In all, 25,309 US babies have been given the name, 0.9% of them girls and 99% boys. Its busiest decade was the 2010s, with 15,454 babies named Jax.
Over the 10 years from 2016 to 2025, 14,273 US boys were named Jax; the busiest of those years was 2016, with 1,813. In 2025 that was about 1 in 1,777 of the boys in SSA’s list for the year.
Among the states, Jax ranked highest in South Dakota in 2025, at #160 for boys there. It was not in the top 100 of any state. Related spellings in the SSA files include Jaxon (114,055 babies since 1880) and Jaxsen (1,948 babies since 1880). Rarer spellings such as Ajax, Jaxs and Jaxe are summarised on this page.