Katelyn is a popular girls' name in United States, ranking #80 in 2008 with 3,976 recorded births. The name reached its all-time peak in 2000 with 5,502 births ranking #54. Since 1996, the popularity has decreased by 26.7%. In 2008, approximately 1 in every 476 girls born was named Katelyn. FALLING Recent data shows the name is currently falling.