Kassidy is a moderately popular girls' name in United States, ranking #465 in 2015 with 687 recorded births. The name reached its all-time peak in 2000 with 1,007 births ranking #314. Since 1996, the popularity has increased by 17.2%. In 2015, approximately 1 in every 2,598 girls born was named Kassidy. FALLING Recent data shows the name is currently falling.