In 2025, 120 US boys were named Isiah, making it the 1,480th most common boys’ name of the year, down 171 places from #1,309 in 2024. That is 29 fewer than the 149 boys named Isiah in 2024. Its best rank for boys was #268, reached in 1894. The most boys given the name in a single year was 822, in 2001. For comparison, it was #1,090 in 2015 and #698 in 1950.
Social Security card records list Isiah in every one of the 146 years from 1880 to 2025; in 1880 there were 20 babies with the name. In all, 24,721 US babies have been given the name, all of them boys. Its busiest decade was the 2000s, with 7,047 babies named Isiah.
Over the 10 years from 2016 to 2025, 1,504 US boys were named Isiah; the busiest of those years was 2016, with 197. In 2025 that was about 1 in 14,234 of the boys in SSA’s list for the year.
Among the states, Isiah ranked highest in Arizona in 2025, at #806 for boys there. It was not in the top 100 of any state. Related spellings in the SSA files include Issiah (1,402 babies since 1880), Iziah (1,332 babies since 1880) and Eziah (1,145 babies since 1880). Rarer spellings such as Esiah, Iasia and Isiaha are summarised on this page.