Donald Edgar Tewes (August 4, 1916 – August 29, 2012) was an American businessman and a Republican member of the United States House of Representatives for Wisconsin.

In 1938, Tewes graduated from Valparaiso University in Valparaiso, Indiana, and two years later graduated from the University of Wisconsin Law School being admitted to the Wisconsin Bar.

During World War II, Tewes served in the United States Army Air Forces, as an intelligence officer in the Flying Tigers, in the China-Burma-India Theater.

After the war, he was president of the Tewes Plastic Corporation in Waukesha, Wisconsin, retiring in 1994.

[2] Tewes voted in favor of the Civil Rights Act of 1957.