John Barden Shadegg (born October 22, 1949) is the former U.S. Representative for Arizona's 3rd congressional district, serving from 1995 until 2011. He is a member of the Republican Party.
The district, numbered as the 4th District before the 2000 Census, includes much of northern Phoenix.
Shadegg is the son of Steve Shadegg of Arizona, who managed Barry Goldwater's 1952 and 1958 U.S. Senate races and organized the Draft Goldwater movement in the 1964 presidential campaign. Steve Shadegg did not, however, manage Goldwater's general election campaign in 1964.