Cassidy is a distinctive boys' name in United States, ranking #2575 in 2025 with 51 recorded births. The name reached its all-time peak in 1996 with 78 births ranking #1371. Since 1996, the popularity has decreased by 34.6%. In 2025, approximately 1 in every 33,492 boys born was named Cassidy. STABLE Recent data shows the name is currently stable.