Demetrius is a moderately popular boys' name in United States, ranking #385 in 2001 with 673 recorded births. The name reached its all-time peak in 1996 with 759 births ranking #338. Since 1996, the popularity has decreased by 11.3%. In 2001, approximately 1 in every 2,887 boys born was named Demetrius. FALLING Recent data shows the name is currently falling.