Casia is a distinctive girls' name in United States, ranking #14215 in 2007 with 7 recorded births. The name reached its all-time peak in 2008 with 17 births ranking #7479. Since 1996, the popularity has decreased by 22.2%. In 2007, approximately 1 in every 274,635 girls born was named Casia. FALLING Recent data shows the name is currently falling.