Katielynn is a distinctive girls' name in United States, ranking #13119 in 2003 with 7 recorded births. The name reached its all-time peak in 2006 with 20 births ranking #6478. Since 1996, the popularity has decreased by 12.5%. In 2003, approximately 1 in every 261,007 girls born was named Katielynn. STABLE Recent data shows the name is currently stable.