Kai is a popular boys' name in United States, ranking #59 in 2022 with 5,366 recorded births. The name reached its all-time peak in 2022 with 5,366 births ranking #59. Since 1996, the popularity has increased by 1,706.7%. In 2022, approximately 1 in every 325 boys born was named Kai. FALLING Recent data shows the name is currently falling.