Katelynn is a distinctive girls' name in United States, ranking #1240 in 2018 with 188 recorded births. The name reached its all-time peak in 1998 with 1,457 births ranking #210. Since 1996, the popularity has decreased by 85.4%. In 2018, approximately 1 in every 9,045 girls born was named Katelynn. STABLE Recent data shows the name is currently stable.