Scarborough Southwest is a federal electoral district in Toronto, Ontario, Canada, that has been represented in the House of Commons of Canada since 1968.

It covers the southwestern part of the Scarborough part of Toronto. It stretches from Lake Ontario in the south to Eglinton Avenue in the north.

It consists of the part of the City of Toronto bounded on the west by Victoria Park Avenue, on the south by Lake Ontario, on the north by Eglinton Avenue and on the east by Markham Road.

The riding includes the neighbourhoods of Birch Cliff, Oakridge, Cliffside, Kennedy Park, Clairlea, Cliffcrest and parts of Scarborough Village and the Golden Mile.

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  1966 to 1976
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  1976 to 1987
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  1987 to 1996
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  1996 to 2003
• 
  2003 to 2013

Scarborough West riding was created in 1966 and from parts of Danforth and York—Scarborough ridings.

It initially consisted of the part of the borough of Scarborough west of a line formed by Midland Avenue the Canadian National Railway line and Brimley Road and south of Eglinton Avenue. It also included the part of the city west of Birchmount Road and south of Lawrence Avenue East.

In 1976, it was redefined to consist of the part of the Borough of Scarborough south Eglinton Avenue East and west of Bellamy Road South, and the part south of Kingston Road and east of Bellamy Ravine Creek.

In 1987, it was redefined to consist of the part of the City of Scarborough south Eglinton Avenue East and west of Markham Road.

The electoral district was abolished in 1996 when it was redistributed when almost all of the riding was transferred to Scarborough Southwest riding.

A new riding named Scarborough Southwest was created out of Scarborough West and a small part of Scarborough East in 1996. It consisted initially of the part of the City of Scarborough lying south and west of a line drawn from the western city limit east along Eglinton Avenue East, north along Markham Road, east along the Canadian National Railway, southwest along Kingston Road, south along Scarborough Golf Club Road, southwest along Hill Crescent, southeast along Bellamy Ravine Creek.

This riding lost territory to Scarborough Centre and gained territory from Scarborough-Guildwood during the 2012 electoral redistribution.

According to the 2021 Canadian census

Ethnic groups: 37.0% White, 24.8% South Asian, 12.3% Black, 8.6% Filipino, 5.1% Chinese, 1.7% West Asian, 1.6% Indigenous, 1.6% Latin American, 1.0% Arab, 1.0% Southeast Asian

Languages: 54.2% English, 8.0% Bengali, 4.1% Tagalog, 2.4% Tamil, 2.3% Cantonese, 1.9% Urdu, 1.4% Mandarin, 1.3% Spanish, 1.1% Greek, 1.1% Amharic, 1.0% French

Religions: 46.5% Christian (23.0% Catholic, 4.3% Christian Orthodox, 3.0% Anglican, 2.1% United Church, 1.2% Pentecostal, 12.9% Other), 18.1% Muslim, 8.4% Hindu, 1.4% Buddhist, 24.4% None

Median income: $35,600 (2020)

Average income: $49,160 (2020)

This riding has elected the following members of the House of Commons of Canada:

Parliament	Years	Member		Party
Scarborough West Riding created from York—Scarborough and Danforth
28th	1968–1972		David Weatherhead	Liberal
29th	1972–1974		John Paul Harney	New Democratic
30th	1974–1979		Alan Gray Martin	Liberal
31st	1979–1980		William Wightman	Progressive Conservative
32nd	1980–1984		David Weatherhead	Liberal
33rd	1984–1988		Reg Stackhouse	Progressive Conservative
34th	1988–1993		Tom Wappel	Liberal
35th	1993–1997
Scarborough Southwest
36th	1997–2000		Tom Wappel	Liberal
37th	2000–2004
38th	2004–2006
39th	2006–2008
40th	2008–2011		Michelle Simson
41st	2011–2015		Dan Harris	New Democratic
42nd	2015–2019		Bill Blair	Liberal
43rd	2019–2021
44th	2021–present

All electoral information is taken from Elections Canada. Italicized expenditures from elections after 1997 refer to candidate submissions, and are presented when the final reviewed totals are not available. Expenditures from 1997 refer to submitted totals. The +/- figures from 1997 and 2004 are adjusted for redistribution.