Cassidee is a distinctive girls' name in United States, ranking #3962 in 2001 with 32 recorded births. The name reached its all-time peak in 2014 with 38 births ranking #3939. Since 1996, the popularity has increased by 88.2%. In 2001, approximately 1 in every 56,267 girls born was named Cassidee. FALLING Recent data shows the name is currently falling.