Cassie is a distinctive girls' name in England & Wales, ranking #585 in 2002 with 48 recorded births. The name reached its all-time peak in 2008 with 133 births ranking #336. Since 1996, the popularity has decreased by 43.5%. In 2002, approximately 1 in every 5,570 girls born was named Cassie. FALLING Recent data shows the name is currently falling.