Cassi is a distinctive girls' name in United States, ranking #15382 in 2025 with 5 recorded births. The name reached its all-time peak in 1999 with 54 births ranking #2615. Since 1996, the popularity has decreased by 86.1%. In 2025, approximately 1 in every 321,453 girls born was named Cassi. FALLING Recent data shows the name is currently falling.