Edwin Martin Schaefer (May 14, 1887 – November 8, 1950) was a U.S. Representative from Illinois. Born in Belleville, St. Clair County, Illinois, Schaefer attended the public schools, Western Military Academy, Alton, Illinois, and the University of Illinois. He graduated from Washington University in St. Louis, Missouri, in 1910. Chemical engineer with Morris & Co., packers, East St. Louis, Illinois from 1913 to 1916, assistant general superintendent 1916–1918, and general superintendent 1919–1928. He served as assistant recorder of deeds of St. Clair County, Illinois from 1928 to 1930. He was the county treasurer of St. Clair County, Illinois from 1930 to 1932. He served as delegate to the Democratic State conventions in 1928, 1932, and 1936.