Edouard Charles Louis Dethier (25 August 1885 – 19 February 1962) was a Belgian classical violinist and teacher.
He was a soloist with the New York Philharmonic and New York Symphony orchestras as well as extensively touring the United States and Canada as a recitalist.
From 1906, he also taught violin at the Juilliard School.
Amongst his many distinguished pupils there was Robert Mann.
He was the brother of Gaston Dethier, a noted organist and pianist, and likewise a teacher at Juilliard for many years.