In 2025, 1,218 US girls were named Lilly, making it the 252nd most common girls’ name of the year, up 9 places from #261 in 2024. That is 3 fewer than the 1,221 girls named Lilly in 2024. Its best rank for girls was #103, reached in 2011. The most girls given the name in a single year was 2,891, in 2010. For comparison, it was #139 in 2015 and #729 in 1950.
Social Security card records list Lilly in every one of the 146 years from 1880 to 2025; in 1880 there were 64 babies with the name. In all, 66,752 US babies have been given the name, all of them girls. Its busiest decade was the 2010s, with 23,527 babies named Lilly.
Over the 10 years from 2016 to 2025, 15,046 US girls were named Lilly; the busiest of those years was 2016, with 2,172. In 2025 that was about 1 in 1,320 of the girls in SSA’s list for the year.
Among the states, Lilly ranked highest in North Dakota in 2025, at #128 for girls there. It was not in the top 100 of any state. Related spellings in the SSA files include Lily (189,789 babies since 1880), Lila (76,550 babies since 1880), Lilia (14,319 babies since 1880) and Lili (3,862 babies since 1880). Rarer spellings such as Lille, Lilija and Lill are summarised on this page. The open nickname list we use links it to Lil and Lily.