Cassidee is a distinctive girls' name in United States, ranking #3310 in 1997 with 35 recorded births. The name reached its all-time peak in 2014 with 38 births ranking #3939. Since 1996, the popularity has increased by 105.9%. In 1997, approximately 1 in every 49,733 girls born was named Cassidee. FALLING Recent data shows the name is currently falling.