Kacy is a distinctive girls' name in United States, ranking #4177 in 2017 with 35 recorded births. The name reached its all-time peak in 1996 with 141 births ranking #1240. Since 1996, the popularity has decreased by 75.2%. In 2017, approximately 1 in every 49,311 girls born was named Kacy. STABLE Recent data shows the name is currently stable.