| Province: | Ontario |
| Fed-Status: | active |
| Fed-District-Number: | 35055 |
| Fed-Created: | 2013 |
| Fed-Election-First: | 2015 |
| Fed-Election-Last: | 2021 |
| Fed-Rep: | Mary Ng |
| Fed-Rep-Party: | Liberal |
| Demo-Pop-Ref: | [1] |
| Demo-Area-Ref: | [2] |
| Demo-Census-Date: | 2021 |
| Demo-Pop: | 97510 |
| Demo-Electors: | 70211 |
| Demo-Electors-Date: | 2015 |
| Demo-Area: | 44 |
| Demo-Cd: | York |
| Demo-Csd: | Markham |
Markham—Thornhill is a federal electoral district in Ontario, Canada, that has been represented in the House of Commons of Canada since 2015. It encompasses a portion of Ontario previously included in the electoral districts of Markham—Unionville and Thornhill.
Markham—Thornhill was created by 2012 federal electoral boundaries redistribution and was legally defined in the 2013 representation order. It came into effect upon the dropping of the writs for the 2015 federal election.
Markham—Thornhill loses more people than any other federal electoral district in the 905 region. The population in 2016 was 99,078 which is a 3.1% drop from 102,221 in 2011.
According to the 2021 Canadian census[3]
Ethnic groups: 42.8% Chinese, 27.5% South Asian, 12.7% White, 3.8% Black, 2.7% Filipino, 3.0% West Asian, 1.3% Korean
Languages: 29.5% English, 18.7% Cantonese, 13.8% Mandarin, 7.6% Tamil, 3.1% Urdu, 2.3% Punjabi, 2.0% Persian, 1.9% Gujarati, 1.3% Tagalog, 1.0% Korean
Religions: 28.2% Christian (13.5% Catholic, 2.4% Christian Orthodox, 1.0% Anglican, 11.3% other), 14.3% Hindu, 10.8% Muslim, 4.7% Buddhist, 3.1% Jewish, 2.2% Sikh, 36.1% none
Median income: $32,400 (2020)
Average income: $47,640 (2020)
This riding has elected the following members of Parliament:
| 2021 federal election redistributed results[4] | |||||
|---|---|---|---|---|---|
| Party | Vote | % | |||
| 27,193 | 61.54 | ||||
| 11,659 | 26.38 | ||||
| 3,693 | 8.36 | ||||
| 883 | 2.00 | ||||
| 762 | 1.72 | ||||
A by-election was held on April 3, 2017, following John McCallum's appointment as Ambassador to China on January 10, 2017.[5]
| 2011 federal election redistributed results[6] | |||||
|---|---|---|---|---|---|
| Party | Vote | % | |||
| 14,128 | 37.11 | ||||
| 13,856 | 36.39 | ||||
| 8,907 | 23.39 | ||||
| 998 | 2.62 | ||||
| Others | 186 | 0.49 | |||