In 2025, 43 US girls were named Niamh, making it the 3,561st most common girls’ name of the year, down 401 places from #3,160 in 2024. That is 8 fewer than the 51 girls named Niamh in 2024. Its best rank for girls was #2,320, reached in 2001. The most girls given the name in a single year was 74, in 2008. For comparison, it was #4,206 in 2015 and unranked in 1950.
Social Security card records list Niamh in 40 years of the 146 from 1880 to 2025, starting in 1969 with 5 babies. In all, 1,617 US babies have been given the name, all of them girls. Its busiest decade was the 2000s, with 636 babies named Niamh.
Over the 10 years from 2016 to 2025, 398 US girls were named Niamh; the busiest of those years was 2024, with 51. In 2025 that was about 1 in 37,378 of the girls in SSA’s list for the year.
Related spellings in the SSA files include Neve (1,608 babies since 1880) and Niam (1,798 babies since 1880). Rarer spellings such as Nieve and Neave are summarised on this page.