In 2025, 37 US girls were named Lilli, making it the 3,953rd most common girls’ name of the year, up 56 places from #4,009 in 2024. That is 0 more than the 37 girls named Lilli in 2024. Its best rank for girls was #1,339, reached in 2006. That year also had the most girls given the name: 174. For comparison, it was #2,518 in 2015 and #2,617 in 1950.
Social Security card records list Lilli in 86 years of the 146 from 1880 to 2025, starting in 1912 with 5 babies. In all, 3,383 US babies have been given the name, all of them girls. Its busiest decade was the 2000s, with 1,302 babies named Lilli.
Over the 10 years from 2016 to 2025, 493 US girls were named Lilli; the busiest of those years was 2017, with 74. In 2025 that was about 1 in 43,440 of the girls in SSA’s list for the year.
Related spellings in the SSA files include Lily (189,789 babies since 1880), Lilly (66,752 babies since 1880), Lili (3,862 babies since 1880) and Lillie (159,791 babies since 1880).