Kacy is a distinctive girls' name in United States, ranking #1736 in 2003 with 109 recorded births. The name reached its all-time peak in 1996 with 141 births ranking #1240. Since 1996, the popularity has decreased by 22.7%. In 2003, approximately 1 in every 16,762 girls born was named Kacy. STABLE Recent data shows the name is currently stable.