In 2025, 5,267 US boys were named Isaiah, making it the 57th most common boys’ name of the year, down 1 place from #56 in 2024. That is 19 fewer than the 5,286 boys named Isaiah in 2024. Its best rank for boys was #39, reached in 2006. That year also had the most boys given the name: 10,459. For comparison, it was #49 in 2015 and #578 in 1950.
Social Security card records list Isaiah in every one of the 146 years from 1880 to 2025; in 1880 there were 40 babies with the name. In all, 254,710 US babies have been given the name, 0.3% of them girls and 99.7% boys. Its busiest decade was the 2000s, with 93,053 babies named Isaiah.
Over the 10 years from 2016 to 2025, 60,731 US boys were named Isaiah; the busiest of those years was 2016, with 7,573. In 2025 that was about 1 in 324 of the boys in SSA’s list for the year.
Among the states, Isaiah ranked highest in Hawaii in 2025, at #26 for boys there. It was in the top 100 in 41 states (counting DC). Related spellings in the SSA files include Isaias (18,644 babies since 1880), Esa (768 babies since 1880), Izaiah (14,909 babies since 1880) and Isai (7,385 babies since 1880). Rarer spellings such as Esaias, Isayah and Isaiha are summarised on this page. The open nickname list we use links it to Zadie and Zay.