List of members of the Canadian House of Commons (O)

O'

 * Joseph Leonard O'Brien b. 1895 first elected in 1940 as National Government member for Northumberland, New Brunswick.
 * Lawrence D. O'Brien b. 1951 first elected in 1996 as Liberal member for Labrador, Newfoundland and Labrador.
 * Pat O'Brien b. 1948 first elected in 1993 as Liberal member for London—Middlesex, Ontario.
 * William Edward O'Brien b. 1831 first elected in 1882 as Conservative member for Muskoka and Parry Sound, Ontario.
 * Jennifer O'Connell b. 1983 first elected in 2015 as Liberal member for Pickering—Uxbridge, Ontario.
 * Martin Patrick O'Connell b. 1916 first elected in 1968 as Liberal member for Scarborough East, Ontario.
 * Dennis James O'Connor b. 1886 first elected in 1930 as Liberal member for Châteauguay—Huntingdon, Quebec.
 * Gordon O'Connor b. 1939 first elected in 2004 as Conservative member for Carleton—Lanark, Ontario.
 * John O'Connor b. 1824 first elected in 1867 as Conservative member for Essex, Ontario.
 * Terrance Patrick O'Connor b. 1940 first elected in 1972 as Progressive Conservative member for Halton, Ontario.
 * John O'Donohoe b. 1824 first elected in 1874 as Liberal-Conservative member for Toronto East, Ontario.
 * Raymond Joseph Michael O'Hurley b. 1909  first elected in 1957 as Progressive Conservative member for Lotbinière, Quebec.
 * Joseph Phillip O'Keefe b. 1909 first elected in 1963 as Liberal member for St. John's East, Newfoundland and Labrador.
 * Brian Alexander O'Kurley b. 1953 first elected in 1988 as Progressive Conservative member for Elk Island, Alberta.
 * Clement Augustine O'Leary b. 1916 first elected in 1958 as Progressive Conservative member for Antigonish—Guysborough, Nova Scotia.
 * Lawrence O'Neil b. 1954 first elected in 1984 as Progressive Conservative member for Cape Breton Highlands—Canso, Nova Scotia.
 * John Raymond O'Neill b. 1891 first elected in 1925 as Conservative member for Timiskaming North, Ontario.
 * Thomas James O'Neill b. 1882 first elected in 1935 as Liberal member for Kamloops, British Columbia.
 * Tilly O'Neill-Gordon b. 1949 first elected in 2008 as Conservative member for Miramichi, New Brunswick.
 * Seamus O'Regan b. 1971 first elected in 2015 as Liberal member for St. John's South—Mount Pearl, Newfoundland and Labrador.
 * James O'Reilly b. 1823 first elected in 1872 as Liberal-Conservative member for Renfrew South, Ontario.
 * John Francis O'Reilly b. 1940 first elected in 1993 as Liberal member for Victoria—Haliburton, Ontario.
 * Sean Patrick O'Sullivan b. 1952 first elected in 1972 as Progressive Conservative member for Hamilton—Wentworth, Ontario.
 * Erin O'Toole b. 1973 first elected in 2012 as Conservative member for Durham, Ontario.

Oa

 * Edwin Randolph Oakes b. 1818 first elected in 1874 as Liberal-Conservative member for Digby, Nova Scotia.

Ob

 * Frank Oberle b. 1932 first elected in 1972 as Progressive Conservative member for Prince George—Peace River, British Columbia.
 * Deepak Obhrai b. 1950 first elected in 1997 as Reform member for Calgary East, Alberta.

Od

 * Bev Oda b. 1944 first elected in 2004 as Conservative member for Clarington—Scugog—Uxbridge, Ontario.
 * Edmond George Odette b. 1884 first elected in 1926 as Liberal member for Essex East, Ontario.

Og

 * Alfred Ogden b. 1843 first elected in 1878 as Conservative member for Guysborough, Nova Scotia.
 * Robert Joseph Ogle b. 1928 first elected in 1979 as New Democratic Party member for Saskatoon East, Saskatchewan.

Ol

 * Harry Olaussen b. 1929 first elected in 1972 as New Democratic Party member for Coast Chilcotin, British Columbia.
 * Rob Oliphant b. 1956 first elected in 2008 as Liberal member for Don Valley West, Ontario.
 * Frank Oliver b. 1853 first elected in 1896 as Liberal member for Provisional District of Alberta, Northwest Territories.
 * Joe Oliver b. 1940 first elected in 2011 as Conservative member for Eglinton—Lawrence, Ontario.
 * John Oliver b. 1956 first elected in 2015 as Liberal member for Oakville, Ontario.
 * Thomas Oliver b. 1821 first elected in 1867 as Liberal member for Oxford North, Ontario.
 * Joseph Mario Jacques Olivier b. 1944 first elected in 1972 as Liberal member for Longueuil, Quebec.
 * Louis Ephrem Olivier b. 1848 first elected in 1878 as Liberal member for Mégantic, Quebec.
 * Horace Andrew Olson b. 1925 first elected in 1957 as Social Credit member for Medicine Hat, Alberta.

Oo

 * John Oostrom b. 1930 first elected in 1984 as Progressive Conservative member for Willowdale, Ontario.

Op

 * Ted Opitz b. 1961 first elected in 2011 as Conservative member for Etobicoke Centre, Ontario.

Or

 * Robert Orange b. 1926 first elected in 1965 as Liberal member for Northwest Territories, Northwest Territories.
 * David Orlikow b. 1918 first elected in 1962 as New Democratic Party member for Winnipeg North, Manitoba.
 * James Norris Ormiston b. 1915  first elected in 1958 as Progressive Conservative member for Melville, Saskatchewan.
 * George Turner Orton b. 1837 first elected in 1874 as Liberal-Conservative member for Wellington Centre, Ontario.

Os

 * Edmund Boyd Osler b. 1845 first elected in 1896 as Conservative member for West Toronto, Ontario.
 * Edmund Boyd Osler b. 1919 first elected in 1968 as Liberal member for Winnipeg South Centre, Manitoba.
 * Marcel Ostiguy b. 1929 first elected in 1978 as Liberal member for Saint-Hyacinthe, Quebec.

Ot

 * Steven Otto b. 1921 first elected in 1962 as Liberal member for York East, Ontario.

Ou

 * André Ouellet b. 1939 first elected in 1967 as Liberal member for Papineau, Quebec.
 * Christian Ouellet b. 1934 first elected in 2006 as Bloc Québécois member for Brome—Missisquoi, Quebec.
 * David Ouellet b. 1908 first elected in 1962 as Social Credit member for Drummond—Arthabaska, Quebec.
 * Gérard Ouellet b. 1913 first elected in 1963 as Social Credit member for Rimouski, Quebec.
 * Robert-Falcon Ouellette b. 1976 first elected in 2015 as Liberal member for Winnipeg Centre, Manitoba.
 * Joseph-Aldric Ouimet b. 1848 first elected in 1873 as Liberal-Conservative member for Laval, Quebec.
 * Joseph-Rodolphe Ouimet b. 1878 first elected in 1922 as Liberal member for Vaudreuil—Soulanges, Quebec.

Ow

 * Charles Lewis Owen b. 1852 first elected in 1907 as Conservative member for Northumberland East, Ontario.
 * Stephen Owen b. 1948 first elected in 2000 as Liberal member for Vancouver Quadra, British Columbia.