Cassidee is a distinctive girls' name in United States, ranking #4948 in 2011 with 28 recorded births. The name reached its all-time peak in 2014 with 38 births ranking #3939. Since 1996, the popularity has increased by 64.7%. In 2011, approximately 1 in every 62,814 girls born was named Cassidee. FALLING Recent data shows the name is currently falling.