Kai is a popular boys' name in United States, ranking #93 in 2025 with 3,768 recorded births. The name reached its all-time peak in 2022 with 5,366 births ranking #59. Since 1996, the popularity has increased by 1,168.7%. In 2025, approximately 1 in every 453 boys born was named Kai. FALLING Recent data shows the name is currently falling.