Casia is a distinctive girls' name in United States, ranking #7479 in 2008 with 17 recorded births. The name reached its all-time peak in 2008 with 17 births ranking #7479. Since 1996, the popularity has increased by 88.9%. In 2008, approximately 1 in every 111,219 girls born was named Casia. FALLING Recent data shows the name is currently falling.