In 2025, 476 US girls were named Sierra, making it the 616th most common girls’ name of the year, down 20 places from #596 in 2024. That is 32 fewer than the 508 girls named Sierra in 2024. Its best rank for girls was #49, reached in 1999. The most girls given the name in a single year was 5,841, in 1998. For comparison, it was #404 in 2015 and #6,000 in 1950.
Social Security card records list Sierra in 82 years of the 146 from 1880 to 2025, starting in 1940 with 32 babies. In all, 100,866 US babies have been given the name, 99.7% of them girls and 0.3% boys. Its busiest decade was the 1990s, with 43,746 babies named Sierra.
Over the 10 years from 2016 to 2025, 6,045 US girls were named Sierra; the busiest of those years was 2016, with 771. In 2025 that was about 1 in 3,377 of the girls in SSA’s list for the year.
Among the states, Sierra ranked highest in New Mexico in 2025, at #215 for girls there. It was not in the top 100 of any state. Related spellings in the SSA files include Cierra (27,659 babies since 1880), Ciera (11,372 babies since 1880), Ciarra (3,352 babies since 1880) and Siera (2,543 babies since 1880). Rarer spellings such as Serra, Siarra and Cieara are summarised on this page.