Arapahoe County is one of Colorado’s fastest growing counties, with more than 650,000 residents.
By 2030, about 800,000 are projected to live here, which would make us the most populous county in the metro area, surpassing the City and County of Denver. The County spans approximately 805 square miles and its diversity is evident throughout, from vibrant urban, suburban, and rural communities, to an unparalleled open space and trail system, to major employment centers and a robust multimodal transportation network. The County is also home to Centennial Airport, one of the busiest general aviation airports in the nation.