Kaitlyn is a popular girls' name in United States, ranking #90 in 2010 with 3,301 recorded births. The name reached its all-time peak in 2000 with 8,759 births ranking #30. Since 1996, the popularity has decreased by 54.4%. In 2010, approximately 1 in every 538 girls born was named Kaitlyn. FALLING Recent data shows the name is currently falling.