Katelynn is a distinctive girls' name in United States, ranking #566 in 2014 with 542 recorded births. The name reached its all-time peak in 1998 with 1,457 births ranking #210. Since 1996, the popularity has decreased by 57.8%. In 2014, approximately 1 in every 3,295 girls born was named Katelynn. STABLE Recent data shows the name is currently stable.