Kacy is a distinctive girls' name in United States, ranking #1915 in 2004 with 98 recorded births. The name reached its all-time peak in 1996 with 141 births ranking #1240. Since 1996, the popularity has decreased by 30.5%. In 2004, approximately 1 in every 18,736 girls born was named Kacy. STABLE Recent data shows the name is currently stable.