Demetrius is a moderately popular boys' name in United States, ranking #500 in 2005 with 496 recorded births. The name reached its all-time peak in 1996 with 759 births ranking #338. Since 1996, the popularity has decreased by 34.7%. In 2005, approximately 1 in every 4,027 boys born was named Demetrius. FALLING Recent data shows the name is currently falling.