Katelyn is a distinctive girls' name in United States, ranking #1077 in 2025 with 225 recorded births. This places Katelyn in the top 6% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2000 with 5,502 births ranking #54. Since 1996, the popularity has decreased by 95.8%. In 2025, approximately 1 in every 7,143 girls born was named Katelyn. FALLING Recent data shows the name is currently falling.