Kay is a distinctive boys' name in United States, ranking #8511 in 2021 with 9 recorded births. This places Kay in the bottom 40% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2024 with 14 births ranking #6303. Since 1996, the popularity has increased by 50.0%. In 2021, approximately 1 in every 194,249 boys born was named Kay. FALLING Recent data shows the name is currently falling.