Delia is a distinctive girls' name in United States, ranking #898 in 1999 with 236 recorded births. The name reached its all-time peak in 2007 with 272 births ranking #986. Since 1996, the popularity has increased by 26.2%. In 1999, approximately 1 in every 7,516 girls born was named Delia. FALLING Recent data shows the name is currently falling.