Katelynn is a distinctive girls' name in United States, ranking #653 in 2015 with 440 recorded births. The name reached its all-time peak in 1998 with 1,457 births ranking #210. Since 1996, the popularity has decreased by 65.7%. In 2015, approximately 1 in every 4,056 girls born was named Katelynn. STABLE Recent data shows the name is currently stable.