Cassi is a distinctive girls' name in United States, ranking #6856 in 2018 with 17 recorded births. The name reached its all-time peak in 1999 with 54 births ranking #2615. Since 1996, the popularity has decreased by 52.8%. In 2018, approximately 1 in every 100,025 girls born was named Cassi. FALLING Recent data shows the name is currently falling.