Kailyn is a distinctive girls' name in United States, ranking #1825 in 2025 with 110 recorded births. The name reached its all-time peak in 2011 with 793 births ranking #397. Since 1996, the popularity has decreased by 62.7%. In 2025, approximately 1 in every 14,612 girls born was named Kailyn. FALLING Recent data shows the name is currently falling.