Regional Municipality of York

York Region
Regional municipality (upper-tier)
Regional Municipality of York
Vaughan Metropolitan Centre Sibbald Point Provincial Park Canada's Wonderland Historic Aurora Markham Civic Centre Rural Nobleton
Coat of arms Logo
Motto:  "Deeds Speak"
Vaughan Markham Aurora East Gwillimbury Georgina King Newmarket Richmond Hill Whitchurch-Stouffville Holland Ldg King City Stouffville Keswick Sutton
Map showing York Region's location in Ontario
Coordinates: 44°00′N 79°26′W
Country	Canada
Province	Ontario
Established	1792 (as York County)
Incorporated	1971 (as a Regional municipality)
Seat	Newmarket
Government
• Type	Council-CEO
• Chair & CEO	Eric Jolliffe
• Governing Body	York Regional Council
Area
• Total	1,758.27 km2 (678.87 sq mi)
Population  (2021)
• Total	1,173,334
• Density	667.3/km2 (1,728/sq mi)
Time zone	UTC-5 (Eastern (EST))
• Summer (DST)	UTC-4 (Eastern (EDT))
Website	www.york.ca

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The Regional Municipality of York, also called York Region, is a regional municipality in Southern Ontario, Canada, between Lake Simcoe and Toronto. The region was established after the passing of then Bill 102, An Act to Establish The Regional Municipality of York, in 1970. It replaced the former York County in 1971, and is part of the Greater Toronto Area and the inner ring of the Golden Horseshoe. The regional government is headquartered in Newmarket.

As of the 2021 census, York Region's population was 1,173,334, with a growth rate of 5.7% from 2016. The Government of Ontario expects its population to surpass 1.5 million residents by 2031. The three largest cities in York Region are Markham, Vaughan and Richmond Hill.