Kai is a distinctive girls' name in United States, ranking #1054 in 2025 with 234 recorded births. The name reached its all-time peak in 2021 with 371 births ranking #769. Since 1996, the popularity has increased by 169.0%. In 2025, approximately 1 in every 6,869 girls born was named Kai. FALLING Recent data shows the name is currently falling.