Kacy is a distinctive girls' name in United States, ranking #3485 in 2009 with 47 recorded births. The name reached its all-time peak in 1996 with 141 births ranking #1240. Since 1996, the popularity has decreased by 66.7%. In 2009, approximately 1 in every 39,082 girls born was named Kacy. STABLE Recent data shows the name is currently stable.