Katelyn is a distinctive girls' name in United States, ranking #761 in 2021 with 376 recorded births. The name reached its all-time peak in 2000 with 5,502 births ranking #54. Since 1996, the popularity has decreased by 93.1%. In 2021, approximately 1 in every 4,361 girls born was named Katelyn. FALLING Recent data shows the name is currently falling.