Cassidie is a distinctive girls' name in United States, ranking #7456 in 2007 with 17 recorded births. The name reached its all-time peak in 1998 with 31 births ranking #3745. Since 1996, the popularity has decreased by 32.0%. In 2007, approximately 1 in every 113,085 girls born was named Cassidie. FALLING Recent data shows the name is currently falling.