In 2025, 113 US girls were named Londynn, making it the 1,789th most common girls’ name of the year, down 256 places from #1,533 in 2024. That is 27 fewer than the 140 girls named Londynn in 2024. Its best rank for girls was #1,057, reached in 2020. The most girls given the name in a single year was 246, in 2015. For comparison, it was #1,069 in 2015 and unranked in 1950.
Social Security card records list Londynn in 22 years of the 146 from 1880 to 2025, starting in 2004 with 8 babies. In all, 3,141 US babies have been given the name, all of them girls. Its busiest decade was the 2010s, with 1,931 babies named Londynn.
Over the 10 years from 2016 to 2025, 1,822 US girls were named Londynn; the busiest of those years was 2020, with 236. In 2025 that was about 1 in 14,224 of the girls in SSA’s list for the year.
Among the states, Londynn ranked highest in Louisiana in 2025, at #738 for girls there. It was not in the top 100 of any state. Related spellings in the SSA files include London (54,779 babies since 1880), Londyn (27,777 babies since 1880) and Lundyn (973 babies since 1880).