Red Deer is a city in Central Alberta, Canada. It is located near the midpoint of the Calgary–Edmonton Corridor and is surrounded by Red Deer County. It is Alberta's third-most-populous city – after Calgary and Edmonton. The city is located in aspen parkland, a region of rolling hills that is subject to oil, grain, and cattle production. It is a centre for oil and agriculture distribution, and the surrounding region is a major centre for petrochemical production.