Cassey is a distinctive girls' name in United States, ranking #9577 in 2005 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 2005, approximately 1 in every 167,973 girls born was named Cassey. FALLING Recent data shows the name is currently falling.