Kacy is a distinctive girls' name in United States, ranking #4933 in 2018 with 27 recorded births. The name reached its all-time peak in 1996 with 141 births ranking #1240. Since 1996, the popularity has decreased by 80.9%. In 2018, approximately 1 in every 62,979 girls born was named Kacy. STABLE Recent data shows the name is currently stable.