The City of Commerce City is a Home Rule Municipality located in Adams County, Colorado, United States. Commerce City is a northern suburb of Denver and as of 2013 is the 18th most populous municipality in Colorado. The city population was 45,913 at the 2010 United States Census, a population increase of 118.7% in the ten years since the 2000 census.Commerce City is a mixed residential and industrial community that is known for an oil refinery with a capacity of 90,000 barrels per day, operated by Suncor. Dick's Sporting Goods Park, a soccer stadium in Commerce City, hosts the Colorado Rapids of Major League Soccer.