Kassidy is a moderately popular girls' name in United States, ranking #339 in 2002 with 889 recorded births. The name reached its all-time peak in 2000 with 1,007 births ranking #314. Since 1996, the popularity has increased by 51.7%. In 2002, approximately 1 in every 2,021 girls born was named Kassidy. FALLING Recent data shows the name is currently falling.