Leonidas has been given to about 10,281 people in the United States since 1880. It was most common in 2022, which makes it a current name.
Leonidas ranks 510th among American boys in 2025, with 591 born that year. Its best year was 2022, when 760 babies were given the name, ranking 421st. The typical living American called Leonidas is about 8 years old today. It is relatively most common in Hawaii, where it accounts for 0.12% of births.
Source: US Social Security Administration, national and state name files, 2025 release, and the Office for National Statistics for England and Wales. Etymology researched and written by our editors. Living-population and median-age figures are our own estimates, described in the methodology.