In 2025, 237 US girls were named Rosalyn, making it the 1,051st most common girls’ name of the year, down 163 places from #888 in 2024. That is 67 fewer than the 304 girls named Rosalyn in 2024. Its best rank for girls was #413, reached in 1952. The most girls given the name in a single year was 422, in 1955. For comparison, it was #1,138 in 2015 and #435 in 1950.
Social Security card records list Rosalyn in 125 years of the 146 from 1880 to 2025, starting in 1899 with 7 babies. In all, 23,278 US babies have been given the name, all of them girls. Its busiest decade was the 1950s, with 3,779 babies named Rosalyn.
Over the 10 years from 2016 to 2025, 2,943 US girls were named Rosalyn; the busiest of those years was 2021, with 332. In 2025 that was about 1 in 6,782 of the girls in SSA’s list for the year.
Among the states, Rosalyn ranked highest in Kentucky in 2025, at #495 for girls there. It was not in the top 100 of any state. Related spellings in the SSA files include Roslyn (18,657 babies since 1880), Rosaline (3,984 babies since 1880), Rosalynn (3,533 babies since 1880) and Roselyn (14,556 babies since 1880). Rarer spellings such as Rosaleen, Rosalin and Rozalyn are summarised on this page. The open nickname list we use links it to Linda, Rosa, Rose and Roz.