Kassidy is a moderately popular girls' name in United States, ranking #481 in 2007 with 673 recorded births. The name reached its all-time peak in 2000 with 1,007 births ranking #314. Since 1996, the popularity has increased by 14.8%. In 2007, approximately 1 in every 2,857 girls born was named Kassidy. FALLING Recent data shows the name is currently falling.