One County Commissioner is elected from each of three districts within the county which by law are approximately equal in population. County Commissioners serve on the Board of County Commissioners and are the principal administrators of the county. Their duties include the following:

• Selling or purchasing public land or buildings for the county
• Calling county elections for various purposes
• Approving the purchase of operating supplies, equipment, and services contracted for the county
• Receiving and approving bids for major purchases or construction projects
• Developing personnel policies
• Supervising construction and maintenance of county roads
• Authorizing and maintaining an inventory of all county property, owned or leased, that is valued at more than $250
• Preparing the county budget in conjunction with other county officers
• Auditing the accounts of other county officers

County Commissioner meetings are typically held each Monday at 9:30 am in Room 119 of the Tulsa County Administration Building, 500 South Denver, Tulsa, Oklahoma. The Commissioners may also hold special meetings as required.