Cassey is a distinctive girls' name in United States, ranking #2764 in 1998 with 48 recorded births. The name reached its all-time peak in 1998 with 48 births ranking #2764. Since 1996, the popularity has increased by 29.7%. In 1998, approximately 1 in every 36,810 girls born was named Cassey. FALLING Recent data shows the name is currently falling.