Caitlin is a highly popular girls' name in England & Wales, ranking #25 in 2004 with 2,115 recorded births. The name reached its all-time peak in 2003 with 2,277 births ranking #22. Since 1996, the popularity has increased by 133.4%. In 2004, approximately 1 in every 135 girls born was named Caitlin. FALLING Recent data shows the name is currently falling.