The 5th largest county in the Denver-Metro area, Adams County appeals to those looking for either suburban or rural living. Home to over 500,000 residents, the county boast popular areas such as Thornton, Aurora, Arvada, Brighton, Westminster and more. Here you can find popular attractions like Water World, the Adams County Fair, Barr Lake State Park, Historic South Platte Trail, and a variety of parks, trails, museums and shopping centers.