Kaitlyn is a popular girls' name in United States, ranking #53 in 2008 with 5,117 recorded births. The name reached its all-time peak in 2000 with 8,759 births ranking #30. Since 1996, the popularity has decreased by 29.3%. In 2008, approximately 1 in every 369 girls born was named Kaitlyn. FALLING Recent data shows the name is currently falling.