King—Vaughan was created by the 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. It was created out of parts of the ridings of Oak Ridges—Markham and Vaughan.

The riding consists of:

Ethnic groups: 66.7% White, 10.9% South Asian, 4.0% Chinese, 3.5% Black, 2.9% Southeast Asian, 2.7% Filipino, 2.7% Latin American, 2.4% West Asian
Languages: 54.3% English, 12.3% Italian, 4.2% Russian, 3.3% Chinese, 2.9% Urdu, 2.7% Spanish, 1.7% Portuguese, 1.7% Farsi, 1.5% Tamil, 1.4% Vietnamese, 1.3% Tagalog, 1.2% Punjabi, 1.0% Arabic
Religions: 68.6% Christian (49.0% Catholic, 4.6% Christian Orthodox, 2.7% United Church, 1.7% Pentecostal, 1.7% Anglican, 1.3% Presbyterian, 7.6% Other), 6.9% Muslim, 4.8% Hindu, 4.5% Jewish, 2.5% Buddhist, 1.1% Sikh, 11.3% No religion
Median income (2010): $34,451
Average income (2010): $50,519

This riding has elected the following Members of Parliament:

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