Cassity is a distinctive girls' name in United States, ranking #6451 in 2002 with 17 recorded births. The name reached its all-time peak in 1998 with 27 births ranking #4155. Since 1996, the popularity has increased by 13.3%. In 2002, approximately 1 in every 105,695 girls born was named Cassity. FALLING Recent data shows the name is currently falling.