In 2025, 5,509 US boys were named Josiah, making it the 54th most common boys’ name of the year, down 1 place from #53 in 2024. That is 23 more than the 5,486 boys named Josiah in 2024. Its best rank for boys was #45, reached in 2019. The most boys given the name in a single year was 7,079, in 2017. For comparison, it was #57 in 2015 and #1,680 in 1950.
Social Security card records list Josiah in every one of the 146 years from 1880 to 2025; in 1880 there were 26 babies with the name. In all, 149,420 US babies have been given the name, 0.3% of them girls and 99.6% boys. Its busiest decade was the 2010s, with 63,282 babies named Josiah.
Over the 10 years from 2016 to 2025, 62,234 US boys were named Josiah; the busiest of those years was 2017, with 7,079. In 2025 that was about 1 in 310 of the boys in SSA’s list for the year.
Among the states, Josiah ranked highest in Georgia in 2025, at #16 for boys there. It was in the top 100 in 36 states (counting DC). Related spellings in the SSA files include Josias (3,517 babies since 1880), Josie (75,915 babies since 1880) and Joziah (5,369 babies since 1880). Rarer spellings such as Josiyah, Joesiah and Josyah are summarised on this page. The open nickname list we use links it to Jos.