Kacy is a distinctive boys' name in United States, ranking #7938 in 2025 with 10 recorded births. The name reached its all-time peak in 1996 with 25 births ranking #2977. Since 1996, the popularity has decreased by 60.0%. In 2025, approximately 1 in every 170,808 boys born was named Kacy. FALLING Recent data shows the name is currently falling.