Cassidie is a distinctive girls' name in United States, ranking #11062 in 2016 with 9 recorded births. The name reached its all-time peak in 1998 with 31 births ranking #3745. Since 1996, the popularity has decreased by 64.0%. In 2016, approximately 1 in every 196,832 girls born was named Cassidie. FALLING Recent data shows the name is currently falling.