Kassidy is a moderately popular girls' name in United States, ranking #332 in 2001 with 930 recorded births. The name reached its all-time peak in 2000 with 1,007 births ranking #314. Since 1996, the popularity has increased by 58.7%. In 2001, approximately 1 in every 1,936 girls born was named Kassidy. FALLING Recent data shows the name is currently falling.