Kaitlyn is a highly popular girls' name in United States, ranking #34 in 2005 with 6,521 recorded births. This places Kaitlyn in the top 1% of ranked US girls' names for the year. Its actual usage is classified as Popular. The name reached its all-time peak in 2000 with 8,759 births ranking #30. In 2005, approximately 1 in every 283 girls born was named Kaitlyn. FALLING Recent data shows the name is currently falling.