Kacy is a distinctive boys' name in United States, ranking #13022 in 2015 with 5 recorded births. The name reached its all-time peak in 1996 with 25 births ranking #2977. Since 1996, the popularity has decreased by 80.0%. In 2015, approximately 1 in every 383,252 boys born was named Kacy. FALLING Recent data shows the name is currently falling.