Kaitlyn is a highly popular girls' name in United States, ranking #44 in 2007 with 5,551 recorded births. The name reached its all-time peak in 2000 with 8,759 births ranking #30. Since 1996, the popularity has decreased by 23.3%. In 2007, approximately 1 in every 346 girls born was named Kaitlyn. FALLING Recent data shows the name is currently falling.