Cassey is a distinctive girls' name in United States, ranking #5714 in 2002 with 20 recorded births. The name reached its all-time peak in 1998 with 48 births ranking #2764. Since 1996, the popularity has decreased by 45.9%. In 2002, approximately 1 in every 89,841 girls born was named Cassey. FALLING Recent data shows the name is currently falling.