John Ottenheimer (born 1953) is a Canadian lawyer and politician in Newfoundland and Labrador. Ottenheimer represented the district of St. John's East in the Newfoundland and Labrador House of Assembly from 1996 to 2007. He was a member of the Progressive Conservative Party (PC) before retiring from provincial politics in 2007. Between 2003 and 2007 he served as the minister of several departments including, Intergovernmental Affairs, Natural Resources and Health and Community Services. In 2007 Ottenheimer was appointed chairman of Newfoundland and Labrador Hydro. He is the younger half-brother of former PC leader and Canadian Senator Gerry Ottenheimer. On March 30, 2011, Ottenheimer announced that he would be the Conservative Party of Canada candidate in the district of Random—Burin—St. George's in the 2011 federal election. He was defeated by Liberal incumbent Judy Foote, receiving 8,322 votes.