Kacy is a distinctive girls' name in United States, ranking #1909 in 2000 with 89 recorded births. The name reached its all-time peak in 1996 with 141 births ranking #1240. Since 1996, the popularity has decreased by 36.9%. In 2000, approximately 1 in every 20,404 girls born was named Kacy. STABLE Recent data shows the name is currently stable.