Caitlin is a moderately popular girls' name in England & Wales, ranking #137 in 2014 with 401 recorded births. The name reached its all-time peak in 2003 with 2,277 births ranking #22. Since 1996, the popularity has decreased by 55.7%. In 2014, approximately 1 in every 765 girls born was named Caitlin. FALLING Recent data shows the name is currently falling.