Cassidy is a distinctive boys' name in United States, ranking #1939 in 2018 with 76 recorded births. This places Cassidy in the top 14% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1996 with 78 births ranking #1371. In 2018, approximately 1 in every 23,888 boys born was named Cassidy. STABLE Recent data shows the name is currently stable.