Katielynn is a distinctive girls' name in United States, ranking #15780 in 2011 with 6 recorded births. The name reached its all-time peak in 2006 with 20 births ranking #6478. Since 1996, the popularity has decreased by 25.0%. In 2011, approximately 1 in every 293,134 girls born was named Katielynn. STABLE Recent data shows the name is currently stable.