Kacy is a distinctive girls' name in United States, ranking #5219 in 2019 with 25 recorded births. The name reached its all-time peak in 1996 with 141 births ranking #1240. Since 1996, the popularity has decreased by 82.3%. In 2019, approximately 1 in every 67,103 girls born was named Kacy. STABLE Recent data shows the name is currently stable.