In 2025, 9 US girls were named Lyn, making it the 10,579th most common girls’ name of the year, up 1,162 places from #11,741 in 2024. That is 1 more than the 8 girls named Lyn in 2024. Its best rank for girls was #534, reached in 1953. The most girls given the name in a single year was 280, in 1957. For comparison, it was #15,650 in 2015 and #631 in 1950.
Fewer than five US boys were named Lyn in 2025, so it does not appear in that year’s SSA list for boys. Its best rank for boys was #882, reached in 1950. That year also had the most boys given the name: 61. For comparison, it was unranked (under five boys) in 2015 and #882 in 1950.
Social Security card records list Lyn in 107 years of the 146 from 1880 to 2025, starting in 1896 with 5 babies. In all, 8,781 US babies have been given the name, 82% of them girls and 18% boys. Its busiest decade was the 1950s, with 2,887 babies named Lyn.
Over the 10 years from 2016 to 2025, 43 US girls were named Lyn; the busiest of those years was 2025, with 9. In 2025 that was about 1 in 178,585 of the girls in SSA’s list for the year.
Related spellings in the SSA files include Lynn (234,778 babies since 1880), Linn (2,294 babies since 1880), Lin (1,897 babies since 1880) and Leon (184,074 babies since 1880).