Cassity is a distinctive girls' name in United States, ranking #4334 in 1999 with 26 recorded births. The name reached its all-time peak in 1998 with 27 births ranking #4155. Since 1996, the popularity has increased by 73.3%. In 1999, approximately 1 in every 68,222 girls born was named Cassity. FALLING Recent data shows the name is currently falling.