Cassidee is a distinctive girls' name in United States, ranking #3939 in 2014 with 38 recorded births. The name reached its all-time peak in 2014 with 38 births ranking #3939. Since 1996, the popularity has increased by 123.5%. In 2014, approximately 1 in every 46,998 girls born was named Cassidee. FALLING Recent data shows the name is currently falling.