Leo is a highly popular boys' name in United States, ranking #19 in 2025 with 8,173 recorded births. The name reached its all-time peak in 2022 with 8,290 births ranking #22. Since 1996, the popularity has increased by 1,728.4%. In 2025, approximately 1 in every 209 boys born was named Leo. STABLE Recent data shows the name is currently stable.