Cailin is a distinctive girls' name in United States, ranking #5045 in 2022 with 26 recorded births. The name reached its all-time peak in 2003 with 164 births ranking #1274. Since 1996, the popularity has decreased by 78.9%. In 2022, approximately 1 in every 63,029 girls born was named Cailin. FALLING Recent data shows the name is currently falling.