Cassidy is a distinctive girls' name in England & Wales, ranking #779 in 2021 with 47 recorded births. This places Cassidy in the top 11% of ranked UK girls' names for the year. Its actual usage is classified as Uncommon. The name reached its all-time peak in 2010 with 67 births ranking #586. Since 1996, the popularity has increased by 193.8%. In 2021, approximately 1 in every 5,831 girls born was named Cassidy. FALLING Recent data shows the name is currently falling.