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Welcome to Arapahoe County, Colorado – the state’s first county and one of the largest with a population of more than 500,000. Arapahoe County was named for the Arapahoe Indians, who along with the Cheyenne Indians, occupied most of Colorado when it was a territory. Back then, Arapahoe County was much larger – occupying most of Colorado and stretching east to western Kansas. Denver was the original county seat until 1902 when the city split off and became a separate county. The City of Littleton became the new county seat and remains the county seat today.

Arapahoe County spans 850 square miles and is a land of contrast. The western part of the County is mostly urban with residential, retail, office and industrial areas, while the eastern portion is relatively rural. Littleton, along with Sheridan, Englewood, Aurora, Foxfield, Glendale, Cherry Hills Village, Columbine Valley, Deer Trail, Bow Mar, Greenwood Village and the new City of Centennial, make up the 12 incorporated communities of Arapahoe County.