Sir is a distinctive boys' name in United States, ranking #2179 in 2025 with 66 recorded births. The name reached its all-time peak in 2021 with 123 births ranking #1466. Since 1996, the popularity has increased by 247.4%. In 2025, approximately 1 in every 25,880 boys born was named Sir. FALLING Recent data shows the name is currently falling.