Cassie is a distinctive girls' name in England & Wales, ranking #645 in 2016 with 65 recorded births. The name reached its all-time peak in 2008 with 133 births ranking #336. Since 1996, the popularity has decreased by 23.5%. In 2016, approximately 1 in every 4,725 girls born was named Cassie. FALLING Recent data shows the name is currently falling.