Demetrius is a moderately popular boys' name in United States, ranking #455 in 2003 with 554 recorded births. The name reached its all-time peak in 1996 with 759 births ranking #338. Since 1996, the popularity has decreased by 27.0%. In 2003, approximately 1 in every 3,565 boys born was named Demetrius. FALLING Recent data shows the name is currently falling.