Katelynn is a distinctive girls' name in United States, ranking #2736 in 2025 with 63 recorded births. The name reached its all-time peak in 1998 with 1,457 births ranking #210. Since 1996, the popularity has decreased by 95.1%. In 2025, approximately 1 in every 25,512 girls born was named Katelynn. STABLE Recent data shows the name is currently stable.