Kaitlyn is a highly popular girls' name in United States, ranking #31 in 2001 with 8,164 recorded births. The name reached its all-time peak in 2000 with 8,759 births ranking #30. Since 1996, the popularity has increased by 12.7%. In 2001, approximately 1 in every 221 girls born was named Kaitlyn. FALLING Recent data shows the name is currently falling.