Cassidee is a distinctive girls' name in United States, ranking #3534 in 2000 with 37 recorded births. The name reached its all-time peak in 2014 with 38 births ranking #3939. Since 1996, the popularity has increased by 117.6%. In 2000, approximately 1 in every 49,080 girls born was named Cassidee. FALLING Recent data shows the name is currently falling.