Katielynn is a distinctive girls' name in United States, ranking #8592 in 2005 with 13 recorded births. The name reached its all-time peak in 2006 with 20 births ranking #6478. Since 1996, the popularity has increased by 62.5%. In 2005, approximately 1 in every 142,131 girls born was named Katielynn. STABLE Recent data shows the name is currently stable.