Cassidi is a distinctive girls' name in United States, ranking #7507 in 2011 with 16 recorded births. This places Cassidi in the top 38% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1999 with 51 births ranking #2704. Since 1996, the popularity has decreased by 56.8%. In 2011, approximately 1 in every 109,925 girls born was named Cassidi. FALLING Recent data shows the name is currently falling.