Caitlin is a highly popular girls' name in England & Wales, ranking #23 in 2002 with 2,222 recorded births. The name reached its all-time peak in 2003 with 2,277 births ranking #22. Since 1996, the popularity has increased by 145.3%. In 2002, approximately 1 in every 120 girls born was named Caitlin. FALLING Recent data shows the name is currently falling.