Cailin is a distinctive girls' name in United States, ranking #12153 in 2025 with 7 recorded births. The name reached its all-time peak in 2003 with 164 births ranking #1274. Since 1996, the popularity has decreased by 94.3%. In 2025, approximately 1 in every 229,610 girls born was named Cailin. FALLING Recent data shows the name is currently falling.