Katielynn is a distinctive girls' name in United States, ranking #13492 in 1999 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 1999, approximately 1 in every 295,630 girls born was named Katielynn. STABLE Recent data shows the name is currently stable.