| Mike Dietsch | |
| Office1: | Lord Mayor of Niagara-on-the-Lake |
| Term Start1: | 1991 |
| Term End1: | 1997 |
| Predecessor1: | Stan Ignatczyk |
| Successor1: | Art Viola |
| Office2: | Ontario MPP |
| Term Start2: | 1987 |
| Term End2: | 1990 |
| Predecessor2: | Peter Partington |
| Successor2: | Christel Haeck |
| Constituency2: | St. Catharines—Brock |
| Party: | Liberal |
| Birth Date: | 2 February 1942 |
| Birth Place: | Toronto, Ontario |
| Death Place: | Niagara-on-the-Lake, Ontario |
| Spouse: | Gail Dietsch |
| Children: | 6 |
| Occupation: | Farmer |
Michael Murray Dietsch (February 2, 1942 - March 9, 2014) was a politician in Ontario, Canada. He served in the Legislative Assembly of Ontario as a Liberal from 1987 to 1990. He also served as mayor of Niagara-on-the-Lake from 1991 to 1997.
Dietsch was educated at Niagara District secondary school, and was a small farm operator and automotive worker in private life.[1] He served as an alderman in Niagara-on-the-Lake from 1974 to 1982 and 1985 to 1987, and was a Regional Councillor from 1982 to 1987 and Deputy Lord Mayor from 1985 to 1987. He was also president of the Niagara-on-the-Lake Jaycees. He lived in Niagara-on-the-Lake, Ontario with his wife Gail. Together they raised six children.[1]
He was elected to the Ontario legislature in the 1987 provincial election, defeating incumbent Progressive Conservative Peter Partington by 2001 votes in the constituency of St. Catharines—Brock.[2] For the next three years, he served as a backbench supporter of David Peterson's government. During his tenure he sponsored and successfully passed three private member's bills - the allowance of credit card sales at wineries, the allowance of Sunday openings at wineries and an irrigation bill to allow farmers to use irrigation ditches to water their crops.[3]
The Liberals were defeated by the Ontario New Democratic Party in the 1990 provincial election and Dietsch lost his seat to Christel Haeck of the NDP by 1,159 votes.[4]
Dietsch returned to municipal politics in 1991 when he was elected Lord Mayor of Niagara-on-the-Lake. He was re-elected in 1994. He was elected as a Regional Councillor for Niagara-on-the-Lake in 1997.[1] Later that year, he sought the Chairmanship of the Niagara Regional Municipality, but lost to Grimsby Regional Councillor Debbie Zimmerman. He did not seek re-election in 2000.
He ran a bed and breakfast inn in the town until 2007 when he retired. He died in 2014 after a long battle with cancer.[1]