John Edward "Jack" Cunningham III (born March 27, 1931) is an American former politician who served as a Republican U.S. Representative from Washington's seventh district for one term from 1977 to 1979.

He served in the United States Air Force Reserve in 1953 and 1954.

Cunningham was elected as a Republican to the seventh district vacancy in a special election when U.S. Representative Brock Adams resigned to become Secretary of Transportation.

However his victory in this liberal district was more the result of confusion with Adams's resignation.

[citation needed] Cunningham lost reelection in 1978, and served from May 17, 1977 – January 3, 1979.