Katielynn is a distinctive girls' name in United States, ranking #9849 in 2014 with 11 recorded births. The name reached its all-time peak in 2006 with 20 births ranking #6478. Since 1996, the popularity has increased by 37.5%. In 2014, approximately 1 in every 162,358 girls born was named Katielynn. STABLE Recent data shows the name is currently stable.