Cassidee is a distinctive girls' name in United States, ranking #5115 in 2002 with 23 recorded births. The name reached its all-time peak in 2014 with 38 births ranking #3939. Since 1996, the popularity has increased by 35.3%. In 2002, approximately 1 in every 78,123 girls born was named Cassidee. FALLING Recent data shows the name is currently falling.