William is an extremely popular boys' name in United States, ranking #9 in 2025 with 10,545 recorded births. The name reached its all-time peak in 1998 with 20,835 births ranking #14. Since 1996, the popularity has decreased by 48.7%. In 2025, approximately 1 in every 162 boys born was named William. STABLE Recent data shows the name is currently stable.