Cassey is a distinctive girls' name in United States, ranking #4972 in 2003 with 25 recorded births. The name reached its all-time peak in 1998 with 48 births ranking #2764. Since 1996, the popularity has decreased by 32.4%. In 2003, approximately 1 in every 73,082 girls born was named Cassey. FALLING Recent data shows the name is currently falling.