Cassey is a distinctive girls' name in United States, ranking #2888 in 1997 with 42 recorded births. The name reached its all-time peak in 1998 with 48 births ranking #2764. Since 1996, the popularity has increased by 13.5%. In 1997, approximately 1 in every 41,444 girls born was named Cassey. FALLING Recent data shows the name is currently falling.