Earl Dewey Eisenhower (February 1, 1898 – December 18, 1968) was an electrical engineer and legislator.
Born in Abilene, Kansas, his brothers were President of the United States Dwight D. Eisenhower, attorney Edgar N. Eisenhower, and university president Milton Eisenhower. Eisenhower moved to the U.S. state of Washington, where he stayed with his brother Edgar who helped with college expenses. Earl Eisenhower graduated from the University of Washington in 1923 with a degree in electrical engineering. After working on a passenger ship, he worked in Pennsylvania with West Penn Power Company and in Illinois with Suburban Newspapers. He died in Scottsdale, Arizona.
He served in the Illinois House of Representatives, as a Republican, from 1965 to 1967. He lived in La Grange Park, Illinois. He was elected as an at-large representative due to problems with reapportionment. He ran for County Clerk of Cook County, Illinois and lost in 1966.