In 2025, 479 US girls were named Siena, making it the 610th most common girls’ name of the year, up 24 places from #634 in 2024. That is 12 more than the 467 girls named Siena in 2024. Its best rank for girls was #606, reached in 2011. The most girls given the name in a single year was 496, in 2018. For comparison, it was #644 in 2015 and unranked in 1950.
Social Security card records list Siena in 47 years of the 146 from 1880 to 2025, starting in 1965 with 5 babies. In all, 11,070 US babies have been given the name, all of them girls. Its busiest decade was the 2010s, with 4,589 babies named Siena.
Over the 10 years from 2016 to 2025, 4,652 US girls were named Siena; the busiest of those years was 2018, with 496. In 2025 that was about 1 in 3,355 of the girls in SSA’s list for the year.
Among the states, Siena ranked highest in Connecticut in 2025, at #160 for girls there. It was not in the top 100 of any state. Related spellings in the SSA files include Sienna (39,887 babies since 1880), Zena (5,986 babies since 1880), Zina (5,073 babies since 1880) and Sena (3,326 babies since 1880). Rarer spellings such as Zeena, Ziana and Ziona are summarised on this page.