Arapahoe County is Colorado’s first county and the third largest in population. It is located in the south metro Denver area. It spans 850 square miles and is a land of contrast. The western part is mostly urban with residential, retail, office and industrial areas, while the eastern portion is relatively rural. Arapahoe County offers a variety of attractive residential choices and a moderate cost of living. Residents enjoy excellent parks, greenbelts and trail systems and an inviting quality of life.