Kaitlyn is a popular girls' name in United States, ranking #67 in 2009 with 4,207 recorded births. The name reached its all-time peak in 2000 with 8,759 births ranking #30. Since 1996, the popularity has decreased by 41.9%. In 2009, approximately 1 in every 437 girls born was named Kaitlyn. FALLING Recent data shows the name is currently falling.