Dean A. Del Mastro (born August 16, 1970) is a former Canadian politician. He represented Peterborough in the House of Commons of Canada as a member of the Conservative Party from January 23, 2006 until November 5, 2014. He resigned from parliament after being convicted of breaking the Elections Canada Act during the 2008 election. He had previously served as the parliamentary secretary to the Prime Minister of Canada and the Minister of Intergovernmental Affairs.