Cassey is a distinctive girls' name in United States, ranking #8136 in 2009 with 15 recorded births. The name reached its all-time peak in 1998 with 48 births ranking #2764. Since 1996, the popularity has decreased by 59.5%. In 2009, approximately 1 in every 122,458 girls born was named Cassey. FALLING Recent data shows the name is currently falling.