Whitby—Oshawa was a federal electoral district in Ontario, Canada, represented in the House of Commons of Canada from 2004 to 2012. Following the 2012 federal electoral boundaries redistribution, the bulk of the district became part of the new Whitby district, while parts were transferred to Oshawa and Durham.

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Whitby—Oshawa

Ontario electoral district
Defunct federal electoral district
Legislature	House of Commons
District created	2003
District abolished	2015
First contested	2004
Last contested	2011
District webpage	profile, map
Demographics
Population (2011)	146,307
Electors (2011)	99,155
Area (km²)	222.30
Census division(s)	Durham
Census subdivision(s)	Whitby, Oshawa

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The riding was created in 2003 and consists of 68 percent of the Whitby—Ajax district, 20 percent of the Oshawa district and three percent of the Durham district.^[1] The provincial electoral district was created from the same ridings in 2007.

The riding consisted of the Town of Whitby and northwestern section of the City of Oshawa (specifically, the portion of the city lying north and west of a line drawn from the western city limit east along King Street West, north along the Oshawa Creek, east along Rossland Road West, north along Simcoe Street North, and east along Winchester Road East to the eastern city limit).

According to the 2011 Canadian census

• Population: 146,307
• Ethnic Groups: 81.4% White, 5.5% Black, 4.3% South Asian, 1.7% Chinese, 1.7% Filipino, 1.4% Aboriginal
• Languages: 85.3% English, 2.1% French, 1.5% Italian, 1.1% Chinese
• Religion: 71.2% Christian (32.6% Catholic, 10.3% United Church, 8.3% Anglican, 2.6% Presbyterian, 2.4% Christian Orthodox, 2.1% Baptist, 10.4% Other Christian), 2.6% Muslim, 1.4% Hindu, 23.6% No religion.
• Average household income: $104,969
• Median household income: $89,608
• Average individual income: $48,444
• Median individual income: $37,099

This riding has elected the following members of Parliament:

Pat Perkins was elected in a November 17, 2014 by-election following the death of Jim Flaherty who died in office on April 10, 2014.^[2]

• List of Canadian federal electoral districts
• Historical federal electoral districts of Canada