Cassey is a distinctive girls' name in United States, ranking #9145 in 2013 with 12 recorded births. The name reached its all-time peak in 1998 with 48 births ranking #2764. Since 1996, the popularity has decreased by 67.6%. In 2013, approximately 1 in every 146,201 girls born was named Cassey. FALLING Recent data shows the name is currently falling.