Arapahoe County, Colorado is the state’s first county and the third largest with a total population of 637,068 and an unincorporated population of 83,764. The County spans 805 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. Arapahoe County has one of the lowest mill levies in the Front Range.

County Government

Arapahoe County was named for the Arapaho Indians, who along with the Cheyenne Indians occupied most of Colorado when it was only a territory. Back then, Arapahoe County was much larger – 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. The County Administration Building is located at 5334 S. Prince St. in Littleton, Colorado. Arapahoe County Government has more than 2,100 employees and an annual budget of $390 million.

Arapahoe County includes the incorporated communities of Aurora, Bennett, Bow Mar, Centennial, Cherry Hills Village, Columbine Valley, Deer Trail, Englewood, Foxfield, Glendale, Greenwood Village, Littleton and Sheridan. There are nine school districts within the county and more than 350 local improvement and special service districts. Arapahoe County offers a variety of attractive residential choices and a moderate cost of living. Residents enjoy excellent parks, greenbelts and trail systems, superior public services and an inviting quality of life.


The Board of County Commissioners serves as the administrative and policy-making body for Arapahoe County. The commissioners are elected by voters to represent five districts, each divided by population. The board oversees departments, approves the budget, hires the management team, administers county services, and oversees land-use planning and development within unincorporated Arapahoe County.

Each year the board sets the budgets for all departments and offices including the offices of the other elected officials including, the Clerk and Recorder, Sheriff, Assessor, Treasurer, Coroner and District Attorney. The county has 2,070 employees.

The commissioners also represent the County on a variety of boards and committees.

The Board of County Commissioners meets at 9:30 a.m. Tuesday. Arapahoe County now live-streams public meetings. Watch a meeting live from the comfort of your home or view video archives of previous meetings. You can also catch meetings and a variety of county videos via our YouTube Channel.

County Commissioners

To read more about the Commissioners view their bios below. Don't know which Commissioner represents you? View our district map.

Want to learn more about Arapahoe County and our Align Arapahoe strategy? Watch our videos: Arapahoe County Video (combined) Service First, Fiscal Responsibility, Quality of Life

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