Cassie is a distinctive girls' name in England & Wales, ranking #668 in 2014 with 59 recorded births. The name reached its all-time peak in 2008 with 133 births ranking #336. Since 1996, the popularity has decreased by 30.6%. In 2014, approximately 1 in every 5,198 girls born was named Cassie. FALLING Recent data shows the name is currently falling.