Casia is a distinctive girls' name in United States, ranking #7662 in 2000 with 13 recorded births. The name reached its all-time peak in 2008 with 17 births ranking #7479. Since 1996, the popularity has increased by 44.4%. In 2000, approximately 1 in every 139,690 girls born was named Casia. FALLING Recent data shows the name is currently falling.