Arapahoe County is located in the state of Colorado, just east of Denver. It was established in 1855 and is one of the original counties in the state. The county covers an area of approximately 805 square miles and includes several cities, such as Aurora and Littleton. The county is known for its diverse communities and recreational opportunities, including parks and trails. It is home to various educational institutions and a growing economy, making it an attractive place for families and businesses. Arapahoe County also has a rich history, with several historical sites and landmarks.