In 2025, 5 US girls were named Sierrah, making it the 16,930th most common girls’ name of the year. Its best rank for girls was #1,946, reached in 1996. The most girls given the name in a single year was 81, in 2001. For comparison, it was #7,227 in 2015 and unranked in 1950.
Social Security card records list Sierrah in 36 years of the 146 from 1880 to 2025, starting in 1986 with 7 babies. In all, 1,150 US babies have been given the name, all of them girls. Its busiest decade was the 2000s, with 521 babies named Sierrah.
Over the 10 years from 2016 to 2025, 37 US girls were named Sierrah; the busiest of those years was 2017, with 9. In 2025 that was about 1 in 321,453 of the girls in SSA’s list for the year.
Related spellings in the SSA files include Sierra (100,866 babies since 1880), Cierra (27,659 babies since 1880) and Siera (2,543 babies since 1880).