Cassidy is a distinctive girls' name in England & Wales, ranking #776 in 2024 with 48 recorded births. The name reached its all-time peak in 2010 with 67 births ranking #586. Since 1996, the popularity has increased by 200.0%. In 2024, approximately 1 in every 5,375 girls born was named Cassidy. STABLE Recent data shows the name is currently stable.