Katelynn is a moderately popular girls' name in United States, ranking #293 in 2008 with 1,138 recorded births. The name reached its all-time peak in 1998 with 1,457 births ranking #210. Since 1996, the popularity has decreased by 11.4%. In 2008, approximately 1 in every 1,661 girls born was named Katelynn. STABLE Recent data shows the name is currently stable.