In 2025, 7 US girls were named Marylyn, making it the 12,716th most common girls’ name of the year. Its best rank for girls was #418, reached in 1936. That year also had the most girls given the name: 238. For comparison, it was #12,596 in 2015 and #1,230 in 1950.
Social Security card records list Marylyn in 105 years of the 146 from 1880 to 2025, starting in 1910 with 5 babies. In all, 3,336 US babies have been given the name, all of them girls. Its busiest decade was the 1930s, with 1,021 babies named Marylyn.
Over the 10 years from 2016 to 2025, 43 US girls were named Marylyn; the busiest of those years was 2016, with 11. In 2025 that was about 1 in 229,610 of the girls in SSA’s list for the year.
Related spellings in the SSA files include Marilyn (374,857 babies since 1880), Marilynn (13,282 babies since 1880), Marylin (4,379 babies since 1880) and Marolyn (1,381 babies since 1880).