Cassidee is a distinctive girls' name in United States, ranking #6703 in 2010 with 19 recorded births. The name reached its all-time peak in 2014 with 38 births ranking #3939. Since 1996, the popularity has increased by 11.8%. In 2010, approximately 1 in every 93,544 girls born was named Cassidee. FALLING Recent data shows the name is currently falling.