John C. Oestreicher (August 5, 1936 – January 4, 2011) was an American Democratic politician and lawyer from Wisconsin.
Born in La Crosse, Wisconsin, he graduated from Aquinas High School and studied political science at University of Wisconsin–La Crosse.
Oestreicher served in the United States Marine Corps and received a law degree from the University of Wisconsin Law School.
Later he served on the Public Service Commission of Wisconsin and the Wisconsin hospital rates board.
This article about a Democratic Party member of the Wisconsin State Assembly is a stub.