Kassidy is a moderately popular girls' name in United States, ranking #454 in 2006 with 694 recorded births. The name reached its all-time peak in 2000 with 1,007 births ranking #314. Since 1996, the popularity has increased by 18.4%. In 2006, approximately 1 in every 2,739 girls born was named Kassidy. FALLING Recent data shows the name is currently falling.