In 2025, 96 US boys were named Niall, making it the 1,706th most common boys’ name of the year, down 128 places from #1,578 in 2024. That is 14 fewer than the 110 boys named Niall in 2024. Its best rank for boys was #1,578, reached in 2024. That year also had the most boys given the name: 110. For comparison, it was #2,380 in 2015 and unranked in 1950.
Social Security card records list Niall in 68 years of the 146 from 1880 to 2025, starting in 1955 with 5 babies. In all, 2,094 US babies have been given the name, all of them boys. Its busiest decade was the 2010s, with 576 babies named Niall.
Over the 10 years from 2016 to 2025, 816 US boys were named Niall; the busiest of those years was 2024, with 110. In 2025 that was about 1 in 17,792 of the boys in SSA’s list for the year.
Among the states, Niall ranked highest in Massachusetts in 2025, at #866 for boys there. It was not in the top 100 of any state. Related spellings in the SSA files include Neil (105,254 babies since 1880), Neal (55,305 babies since 1880), Nigel (12,371 babies since 1880) and Nell (27,710 babies since 1880). Rarer spellings such as Nihaal are summarised on this page.