Cassey is a distinctive girls' name in United States, ranking #10264 in 2007 with 11 recorded births. The name reached its all-time peak in 1998 with 48 births ranking #2764. Since 1996, the popularity has decreased by 70.3%. In 2007, approximately 1 in every 174,768 girls born was named Cassey. FALLING Recent data shows the name is currently falling.