In 2025, 41 US girls were named Marilynn, making it the 3,685th most common girls’ name of the year, down 369 places from #3,316 in 2024. That is 7 fewer than the 48 girls named Marilynn in 2024. Its best rank for girls was #348, reached in 1944. The most girls given the name in a single year was 407, in 1947. For comparison, it was #2,704 in 2015 and #409 in 1950.
Social Security card records list Marilynn in 112 years of the 146 from 1880 to 2025, starting in 1914 with 7 babies. In all, 13,282 US babies have been given the name, all of them girls. Its busiest decade was the 1940s, with 3,569 babies named Marilynn.
Over the 10 years from 2016 to 2025, 511 US girls were named Marilynn; the busiest of those years was 2017, with 69. In 2025 that was about 1 in 39,202 of the girls in SSA’s list for the year.
Related spellings in the SSA files include Marilyn (374,857 babies since 1880), Marylyn (3,336 babies since 1880) and Marolyn (1,381 babies since 1880). Rarer spellings such as Marylynne, Mariahlynn and Marylinn are summarised on this page.