Kay is a distinctive boys' name in United States, ranking #7951 in 2025 with 10 recorded births. The name reached its all-time peak in 2024 with 14 births ranking #6303. Since 1996, the popularity has increased by 66.7%. In 2025, approximately 1 in every 170,808 boys born was named Kay. FALLING Recent data shows the name is currently falling.