Casia is a distinctive girls' name in United States, ranking #8964 in 2002 with 11 recorded births. The name reached its all-time peak in 2008 with 17 births ranking #7479. Since 1996, the popularity has increased by 22.2%. In 2002, approximately 1 in every 163,347 girls born was named Casia. FALLING Recent data shows the name is currently falling.