Kassidy is a moderately popular girls' name in United States, ranking #395 in 2003 with 770 recorded births. The name reached its all-time peak in 2000 with 1,007 births ranking #314. Since 1996, the popularity has increased by 31.4%. In 2003, approximately 1 in every 2,373 girls born was named Kassidy. FALLING Recent data shows the name is currently falling.