Joseph "Joe" Preston (born June 14, 1955 in Chatham, Ontario) is a Canadian politician and Conservative Member of Parliament representing Elgin—Middlesex—London riding.
He defeated Liberal incumbent Gar Knutson in the 2004 federal election. He was re-elected in both the 2006 federal election and the 2008 federal election.
Prior to the election, he was an entrepreneur in St. Thomas, Ontario and was active in local politics.