Cassidee is a distinctive girls' name in United States, ranking #4154 in 1998 with 27 recorded births. The name reached its all-time peak in 2014 with 38 births ranking #3939. Since 1996, the popularity has increased by 58.8%. In 1998, approximately 1 in every 65,440 girls born was named Cassidee. FALLING Recent data shows the name is currently falling.