Cassity is a distinctive girls' name in United States, ranking #4155 in 1998 with 27 recorded births. The name reached its all-time peak in 1998 with 27 births ranking #4155. Since 1996, the popularity has increased by 80.0%. In 1998, approximately 1 in every 65,440 girls born was named Cassity. FALLING Recent data shows the name is currently falling.