Cassidee is a distinctive girls' name in United States, ranking #6857 in 2008 with 19 recorded births. This places Cassidee in the top 33% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2014 with 38 births ranking #3939. Since 1996, the popularity has increased by 11.8%. In 2008, approximately 1 in every 99,511 girls born was named Cassidee. FALLING Recent data shows the name is currently falling.