| MacArthur, Duncan | Middlesex North | Conservative Party |
| Macaulay, Leopold | York South | Conservative Party |
| Macaulay, Robert William | Riverdale | Progressive Conservative Party of Ontario |
| MacBeth, John Palmer | Humber | Progressive Conservative Party of Ontario |
| MacBride, Morrison Mann | Brantford | Independent-Liberal |
| MacCharles, Tracy | Pickering—Scarborough East | Ontario Liberal Party |
| MacDiarmid, Findlay George | Elgin West | Conservative Party |
| MacDonald, Donald Cameron | York South | New Democratic Party of Ontario |
| MacDonald, Herbert Stone | Leeds South | Conservative Party |
| Macdonald, John Sandfield | Cornwall | Conservative Party |
| MacDonald, Keith | Prince Edward—Lennox | Ontario Liberal Party |
| MacDonald, William | Bruce Centre | Ontario Liberal Party |
| MacDougall, William | Simcoe South | Independent-Liberal |
| MacFie, Charles Maitland | Middlesex South | Ontario Liberal Party |
| MacGillivray, Edmund Aberdeen | Glengarry | Ontario Liberal Party |
| Machin, Harold Arthur Clement | Kenora | Conservative Party |
| Mack, William | Stormont | Ontario Liberal Party |
| MacKay, Alexander Grant | Grey North | Ontario Liberal Party |
| MacKay, Andrew | Oxford North | Ontario Liberal Party |
| MacKay, John P. | Hamilton East | Ontario Liberal Party |
| MacKay, William John | Bruce South | Ontario Liberal Party |
| MacKenzie, Addison Alex | York North | Progressive Conservative Party of Ontario |
| Mackenzie, Alexander | Middlesex West | Ontario Liberal Party |
| Mackenzie, Bob Warren | Hamilton East | New Democratic Party of Ontario |
| Mackenzie, Charles | Lambton West | Ontario Liberal Party |
| MacKenzie, Donald | Middlesex East | Ontario Liberal Party |
| MacKenzie, Harold Arthur | Ottawa Centre | Ontario Liberal Party |
| MacKinnon, Ellen | Lambton | New Democratic Party of Ontario |
| MacLaren, Jack | Carleton—Mississippi Mills | Independent |
| MacLeod, Albert Alexander | Bellwoods | Labour-Progressive |
| MacLeod, Lisa | Nepean | Progressive Conservative Party of Ontario |
| Macmaster, Donald | Glengarry | Conservative Party |
| MacNaughton, Charles Steel | Huron | Progressive Conservative Party of Ontario |
| Macnish, Donald | Elgin West | Ontario Liberal Party |
| MacOdrum, Charles Gordon | Leeds | Progressive Conservative Party of Ontario |
| Macphail, Agnes Campbell | York East | Co-operative Commonwealth Federation |
| MacQuarrie, Robert W. | Carleton East | Progressive Conservative Party of Ontario |
| MacVicar, Malcolm | Elgin East | United Farmers of Ontario |
| Madill, Frank | Ontario North | Conservative Party |
| Maeck, Lorne Howard | Parry Sound | Progressive Conservative Party of Ontario |
| Mageau, Zotique | Sturgeon Falls | Ontario Liberal Party |
| Magladery, Thomas | Timiskaming | Conservative Party |
| Magwood, Thomas | Perth North | Conservative Party |
| Mahaffy, Arthur Arnold | Muskoka | Conservative Party |
| Mahoney, Steven W. | Mississauga West | Ontario Liberal Party |
| Mahoney, Thomas Joseph | Wentworth South | Conservative Party |
| Makarchuk, Mitro | Brantford | New Democratic Party of Ontario |
| Malcolm, Andrew | Bruce Centre | Ontario Liberal Party |
| Malhi, Harinder | Brampton—Springdale | Ontario Liberal Party |
| Malkowski, Gary | York East | New Democratic Party of Ontario |
| Maloney, James Anthony | Renfrew South | Progressive Conservative Party of Ontario |
| Mamakwa, Sol | Kiiwetinoong | New Democratic Party of Ontario |
| Mammoliti, George | Yorkview | New Democratic Party of Ontario |
| Mancini, Remo J. | Essex South | Ontario Liberal Party |
| Mangat, Amrit | Mississauga—Brampton South | Ontario Liberal Party |
| Manley, Peter Thomas | Stormont | Ontario Liberal Party |
| Mantha, Michael | Algoma—Manitoulin | Independent |
| Mapledoram, Clare Edgar | Fort William | Progressive Conservative Party of Ontario |
| Marceau, Joseph Henri | Nipissing | Ontario Liberal Party |
| Marchese, Rosario | Trinity—Spadina | New Democratic Party of Ontario |
| Mark, James Raglan | Victoria North | Conservative Party |
| Marland, Margaret | Mississauga South | Progressive Conservative Party of Ontario |
| Marsales, Judy | Hamilton West | Ontario Liberal Party |
| Marshall, Duncan McLean | Peel | Ontario Liberal Party |
| Marshall, Thomas A. | Lincoln | Ontario Liberal Party |
| Martel, Elie Walter | Sudbury East | New Democratic Party of Ontario |
| Martel, Shelley | Nickel Belt | New Democratic Party of Ontario |
| Marter, George Frederick | Toronto North | Conservative Party |
| Martin, Charles Hammond | Haldimand—Norfolk | Progressive Conservative Party of Ontario |
| Martin, D'Arcy Argue Counsell | Hamilton West | Conservative Party |
| Martin, John Strickler | Norfolk | Conservative Party |
| Martin, Robin | Eglinton—Lawrence | Progressive Conservative Party of Ontario |
| Martin, Tony | Sault Ste. Marie | New Democratic Party of Ontario |
| Martin, Victor | Nipissing | Ontario Liberal Party |
| Martin, William George | Brantford | Conservative Party |
| Martiniuk, Gerry | Cambridge | Progressive Conservative Party of Ontario |
| Martins, Cristina | Davenport | Ontario Liberal Party |
| Martow, Gila | Thornhill | Progressive Conservative Party of Ontario |
| Martyn, John Burton | Lambton East | Conservative Party |
| Mason, Robert Mercer | Victoria North | Conservative Party |
| Massie, James | Wellington South | Ontario Liberal Party |
| Master, Isaac | Waterloo South | Ontario Liberal Party |
| Matchett, Thomas | Victoria South | Ontario Liberal Party |
| Matheson, Arthur James | Lanark South | Conservative Party |
| Mathieu, James Arthur | Rainy River | Conservative Party |
| Mathyssen, Irene | Middlesex | New Democratic Party of Ontario |
| Matrundola, Gino | Willowdale | Ontario Liberal Party |
| Matthews, Deborah | London North Centre | Ontario Liberal Party |
| Mauro, Bill | Thunder Bay—Atikokan | Ontario Liberal Party |
| Maves, Bart | Niagara Falls | Progressive Conservative Party of Ontario |
| May, George Samuel | Ottawa (2 Seats) | Ontario Liberal Party |
| Mayberry, Thomas Richard | Oxford South | Ontario Liberal Party |
| Mazzilli, Frank | London—Fanshawe | Progressive Conservative Party of Ontario |
| McAllister, William Balmer | Renfrew North | Conservative Party |
| McAlpine, Donald | Brockville | Ontario Liberal Party |
| McAndrew, John Alfred | Renfrew South | Ontario Liberal Party |
| McArthur, Duncan | Simcoe Centre | Ontario Liberal Party |
| McArthur, Frederick John | Northumberland | Conservative Party |
| McArthur, Robert Neil | Wellington West | United Farmers of Ontario |
| McBrien, Frederick George | Parkdale | Conservative Party |
| McCaffrey, Bruce Robert | Armourdale | Progressive Conservative Party of Ontario |
| McCague, George R. | Simcoe West | Progressive Conservative Party of Ontario |
| McCall, Simpson | Norfolk South | Ontario Liberal Party |
| McCallum, Lachlin | Monck | Conservative Party |
| McCallum, Malcolm Alex | Bruce South | Progressive |
| McCallum, Peter Duncan | Lambton East | Independent |
| McCart, William John | Stormont | Ontario Liberal Party |
| McCarthy, Hon. Todd J. | Durham | Progressive Conservative Party of Ontario |
| McCausland, James Arthur | Toronto Southwest — Seat A | Conservative Party |
| McCleary, William | Welland | Conservative Party |
| McClellan, Ross A. | Bellwoods | New Democratic Party of Ontario |
| McClelland, Carman | Brampton North | Ontario Liberal Party |
| McCoig, Archibald Blake | Kent West | Ontario Liberal Party |
| McColl, Dugald | Elgin West | Conservative Party |
| McColl, Nicol | Elgin West | Conservative Party |
| McColman, Neil | Grey East | Conservative Party |
| McCormick, Robert John | Lambton East | Ontario Liberal Party |
| McCowan, Alexander | York East | Conservative Party |
| McCraney, Daniel | Kent East | Ontario Liberal Party |
| McCrea, Charles | Sudbury | Conservative Party |
| McCreary, Hiram | Lanark North | United Farmers of Ontario |
| McCrimmon, Karen | Kanata—Carleton | Ontario Liberal Party |
| McCuaig, James Simeon | Prince Edward | Conservative Party |
| McCue, John Arthur | Lanark | Progressive Conservative Party of Ontario |
| McDonald, AL | Nipissing | Progressive Conservative Party of Ontario |
| McDonald, Donald Robert | Glengarry | Conservative Party |
| McDonald, Ernest Nicholls | Peterborough East | United Farmers of Ontario |
| McDonald, John Lawrence | Stormont | Progressive Conservative Party of Ontario |
| McDonald, John Stevenson | Bruce Centre | Liberal-Patron |
| McDonald, William | Bruce North | Ontario Liberal Party |
| McDonell, Jim | Stormont—Dundas—South Glengarry | Progressive Conservative Party of Ontario |
| McDougal, Donald Joseph | Ottawa East | Ontario Liberal Party |
| McDougall, John | Middlesex North | Conservative Party |
| McDougall, John Lorn | Renfrew South | Ontario Liberal Party |
| McElroy, Robert Herbert | Carleton | Conservative Party |
| McEwen, Joseph Earl | Frontenac—Addington | Progressive Conservative Party of Ontario |
| McEwing, James | Wellington West | Ontario Liberal Party |
| McEwing, Ross Atkinson | Wellington North | Ontario Liberal Party |
| McFadden, David James | Eglinton | Progressive Conservative Party of Ontario |
| McFarlan, John | Middlesex East | Conservative Party |
| McGarry, Kathryn | Cambridge | Ontario Liberal Party |
| McGarry, Thomas William | Renfrew South | Conservative Party |
| McGhee, Robert | Dufferin | Conservative Party |
| McGill, William | Ontario South | Ontario Liberal Party |
| McGillis, Angus | Glengarry | Conservative Party |
| McGowan, John | Wellington West | Conservative-Liberal Party |
| McGregor, Hon. Graham | Brampton North | Progressive Conservative Party of Ontario |
| McGuigan, James Fitzgerald | Essex—Kent | Ontario Liberal Party |
| McGuinty, Dalton | Ottawa South | Ontario Liberal Party |
| McGuinty, Dalton James | Ottawa South | Ontario Liberal Party |
| McIlveen, Charles Elmer | Oshawa | Progressive Conservative Party of Ontario |
| McIntyre, Alexander Fraser | Cornwall | Conservative Party |
| McIntyre, Daniel | Middlesex South | Progressive Conservative Party of Ontario |
| McIntyre, Duncan John | Victoria South | Ontario Liberal Party |
| McKay, Angus | Oxford South | Ontario Liberal Party |
| McKay, George Prevost | Simcoe South | Conservative Party |
| McKay, John | Victoria West | Ontario Liberal Party |
| McKechnie, Gilbert | Grey South | Ontario Liberal Party |
| McKee, William J. | Essex North | Ontario Liberal Party |
| McKellar, Archibald | Kent East | Ontario Liberal Party |
| McKenna, Jane | Burlington | Progressive Conservative Party of Ontario |
| McKenney, Catherine | Ottawa Centre | New Democratic Party of Ontario |
| McKenzie, Hugh | Lambton East | Ontario Liberal Party |
| McKeough, William Darcy | Chatham—Kent | Progressive Conservative Party of Ontario |
| McKeown, Charles Robert | Dufferin | Conservative Party |
| McKessock, Robert Carson | Grey | Ontario Liberal Party |
| McKim, Robert | Wellington North | Ontario Liberal Party |
| McKnight, Michael | Elgin East | Conservative Party |
| McLaren, Alexander | Hastings East | Liberal-Patron |
| McLaughlin, James Wellington | Durham West | Ontario Liberal Party |
| McLaughlin, John | Stormont | Conservative Party |
| McLaws, David | Elgin West | Ontario Liberal Party |
| McLean, Alexander Daniel | Middlesex North | Independent-Progressive |
| McLean, Allan Kenneth | Simcoe East | Progressive Conservative Party of Ontario |
| McLean, Alvin Coulter | Eglinton | Conservative Party |
| McLean, Murdo Young | Huron South | Ontario Liberal Party |
| McLenaghan, Nathaniel | Lanark South | Conservative Party |
| McLeod, James William | Stormont | Ontario Liberal Party |
| McLeod, John | Durham West | Ontario Liberal Party |
| McLeod, Lyn | Thunder Bay—Atikokan | Ontario Liberal Party |
| McLeod, William Duncan | Glengarry | Conservative Party |
| McMahon, Eleanor | Burlington | Ontario Liberal Party |
| McMahon, James | Wentworth North | Ontario Liberal Party |
| McMahon, Mary-Margaret | Beaches—East York | Ontario Liberal Party |
| McManus, George | Cardwell | Conservative-Liberal Party |
| McMeekin, Richard M. | Sault Ste. Marie | Ontario Liberal Party |
| McMeekin, Ted | Ancaster—Dundas—Flamborough—Westdale | Ontario Liberal Party |
| McMillan, Edward B. | Kent East | Ontario Liberal Party |
| McMillan, John Angus | Glengarry | Ontario Liberal Party |
| McMillen, Andrew Robinson | Lambton West | Conservative Party |
| McMurrich, John | York North | Ontario Liberal Party |
| McMurtry, Roland "Roy" | Eglinton | Progressive Conservative Party of Ontario |
| McNamara, Joseph | Riverdale | Soldier |
| McNaught, William Kirkpatrick | Toronto North — Seat A | Conservative Party |
| McNaughton, Daniel | Bruce North | Liberal-Protestant Protective Association |
| McNaughton, Duncan Alexander | Stormont | Conservative Party |
| McNaughton, Monte | Lambton—Kent—Middlesex | Progressive Conservative Party of Ontario |
| McNeely, Phil | Ottawa—Orléans | Ontario Liberal Party |
| McNeil, Ronald Keith | Elgin | Progressive Conservative Party of Ontario |
| McNeill, John | Perth South | Liberal-Patron |
| McNicol, David | Grey South | Patron Party |
| McNie, John Duncan | Hamilton West | Progressive Conservative Party of Ontario |
| McPhee, John Duncan | Simcoe East | Progressive Conservative Party of Ontario |
| McPherson, David Murdoch | Glengarry | Liberal-Patron |
| McPherson, William David | Toronto Northwest — Seat B | Conservative Party |
| McQueen, James | Wentworth North | Ontario Liberal Party |
| McQuesten, Thomas Baker | Hamilton—Wentworth | Ontario Liberal Party |
| McQuibban, George Alexander | Wellington North | Ontario Liberal Party |
| McRae, Duncan | Victoria North | Conservative Party |
| McVicar, Milton Duncan | Lambton East | Ontario Liberal Party |
| Meacham, Walter William | Lennox | Conservative Party |
| Medd, William George | Huron South | United Farmers of Ontario |
| Meen, Arthur Kenneth | York East | Progressive Conservative Party of Ontario |
| Meilleur, Madeleine | Ottawa—Vanier | Ontario Liberal Party |
| Meinzinger, Joseph Ignatino | Waterloo North | Independent |
| Mercer, Cecil George | Durham | Ontario Liberal Party |
| Meredith, William Ralph | London | Conservative Party |
| Merrick, Henry | Leeds North and Grenville North | Conservative Party |
| Metcalfe, James Henry | Kingston | Conservative Party |
| Mewhinney, Alexander Patterson | Bruce North | Ontario Liberal Party |
| Michaud, Joseph | Nipissing West | Ontario Liberal Party |
| Michener, Daniel Roland | St. David | Progressive Conservative Party of Ontario |
| Miclash, Frank Ranover | Kenora | Ontario Liberal Party |
| Middleton, James Taylor | Hamilton East | Ontario Liberal Party |
| Milczyn, Peter Z. | Etobicoke—Lakeshore | Ontario Liberal Party |
| Millard, Charles Hibbert | York West | Co-operative Commonwealth Federation |
| Millen, Gordon James | Riverdale | Progressive Conservative Party of Ontario |
| Miller, Edward Blake | Elgin East | Ontario Liberal Party |
| Miller, Frank Stuart | Muskoka | Progressive Conservative Party of Ontario |
| Miller, Gordon Irvin | Norfolk | Ontario Liberal Party |
| Miller, John Classon | Muskoka and Parry Sound | Ontario Liberal Party |
| Miller, John Stewart | Addington | Conservative Party |
| Miller, Norman | Parry Sound—Muskoka | Progressive Conservative Party of Ontario |
| Miller, Paul | Hamilton East—Stoney Creek | Independent |
| Miller, Robert Francis | Haldimand | Ontario Liberal Party |
| Miller, Wilfred Lynn | Algoma—Manitoulin | Ontario Liberal Party |
| Milligan, John Colborne | Stormont | Conservative Party |
| Milligan, Rob E. | Northumberland—Quinte West | Progressive Conservative Party of Ontario |
| Milloy, John | Kitchener Centre | Ontario Liberal Party |
| Mills, Charles Henry | Waterloo North | Conservative Party |
| Mills, Gordon L. | Durham East | New Democratic Party of Ontario |
| Mills, Henry | Fort William | Labour |
| Ming, Edward | Frontenac—Lennox | Ontario Liberal Party |
| Miscampbell, Andrew | Sault Ste. Marie | Conservative Party |
| Mitas, Christina Maria | Scarborough Centre | Progressive Conservative Party of Ontario |
| Mitchell, Carol | Huron—Bruce | Ontario Liberal Party |
| Mitchell, George Herbert | York North | Co-operative Commonwealth Federation |
| Mitchell, John Henry | Simcoe Southwest | Liberal-Progressive |
| Mitchell, Robert C. | Carleton | Progressive Conservative Party of Ontario |
| Moffatt, Douglas Peter | Durham East | New Democratic Party of Ontario |
| Moffatt, Foster Graham | Bruce South | Conservative Party |
| Molinari, Tina R. | Thornhill | Progressive Conservative Party of Ontario |
| Monaghan, Gerald Joseph | Sudbury | Progressive Conservative Party of Ontario |
| Monk, George William | Carleton | Conservative Party |
| Monteith, Andrew | Perth North | Conservative Party |
| Monteith, John C. | Perth North | Conservative Party |
| Monteith, Joseph Dunsmore | Perth North | Conservative Party |
| Monteith, Samuel Nelson | Perth South | Conservative Party |
| Monteith-Farrell, Judith | Thunder Bay—Atikokan | New Democratic Party of Ontario |
| Montgomery, Hugh | Lambton East | Conservative Party |
| Montgomery, Wesley | Northumberland East | United Farmers of Ontario |
| Moore, James Percy | London North | Conservative Party |
| Moore, John Douglas | Waterloo South | Ontario Liberal Party |
| Morel, Henri | Nipissing | Conservative Party |
| Morgan, William | Norfolk South | Conservative Party |
| Moridi, Reza | Richmond Hill | Ontario Liberal Party |
| Morin, Blain Kevin | Nickel Belt | New Democratic Party of Ontario |
| Morin, Gilles E. | Carleton East | Ontario Liberal Party |
| Morin, James E. | Welland | Ontario Liberal Party |
| Morin, Jules | Ottawa East | Progressive Conservative Party of Ontario |
| Morin-Strom, Karl Avid | Sault Ste. Marie | New Democratic Party of Ontario |
| Morningstar, Ellis Price | Welland | Progressive Conservative Party of Ontario |
| Morris, Alexander | Toronto East | Conservative Party |
| Morrison, Marshall Bidwell | Hastings West | Conservative Party |
| Morrison, Suze | Toronto Centre | New Democratic Party of Ontario |
| Morrison, William | Hamilton East | Conservative Party |
| Morrow, Donald Hugo | Ottawa West | Progressive Conservative Party of Ontario |
| Morrow, Mark | Wentworth East | New Democratic Party of Ontario |
| Moscrip, William Caven | Perth South | Ontario Liberal Party |
| Mossop, Jennifer F. | Stoney Creek | Ontario Liberal Party |
| Mostyn, William | Lanark North | Conservative Party |
| Mowat, Oliver | Oxford North | Ontario Liberal Party |
| Mulholland, Robert | Northumberland West | Conservative Party |
| Mulroney, Hon. Caroline | York—Simcoe | Progressive Conservative Party of Ontario |
| Munro, Duncan Paul | Wellington South | Ontario Liberal Party |
| Munro, Hugh | Glengarry | Ontario Liberal Party |
| Munro, James S. | Oxford North | Ontario Liberal Party |
| Munro, John W. | Renfrew North | Ontario Liberal Party |
| Munro, Julia | York—Simcoe | Progressive Conservative Party of Ontario |
| Munro, Lily Oddie | Hamilton Centre | Ontario Liberal Party |
| Murdoch, Bill | Bruce—Grey—Owen Sound | Progressive Conservative Party of Ontario |
| Murdoch, Gilbert Hugh | Simcoe Centre | United Farmers of Ontario |
| Murdoch, William | Essex South | Progressive Conservative Party of Ontario |
| Murdock, Sharon Margaret | Sudbury | New Democratic Party of Ontario |
| Murphy, Dennis | Ottawa (2 Seats) | Conservative Party |
| Murphy, Edward Joseph | St. Patrick | Conservative Party |
| Murphy, Thomas Alexander | Beaches | Progressive Conservative Party of Ontario |
| Murphy, Timothy John | St. George—St. David | Ontario Liberal Party |
| Murray, Glen R. | Toronto Centre | Ontario Liberal Party |
| Murray, Thomas | Renfrew North | Ontario Liberal Party |
| Murray, Thomas Patrick | Renfrew South | Ontario Liberal Party |
| Murray, William Alexander | Stormont | Ontario Liberal Party |
| Musgrove, Armstrong H. | Huron North | Conservative Party |
| Musgrove, George Johnston | Niagara Falls | Conservative Party |
| Mushinski, Marilyn | Scarborough Centre | Progressive Conservative Party of Ontario |
| Mutrie, John | Wellington South | Ontario Liberal Party |
| Myers, Raymond Munro | Waterloo South | Progressive Conservative Party of Ontario |
