The County Commissioners are the governing board of the county. They manage the business concerns of the county. The Commissioners approve budgets for the various county departments and set salaries and policies. They have the authority to set the salaries of the Elected Officials, including their own, within statutory limitations, and to establish salaries of other employees.  The Commissioners authorize various Elected Officials to appoint one or more deputies and hire other such employees as may be necessary. 
They sign vouchers approving payment of bills. The Commissioners are authorized by law to set the mill levy of all entities within Park County which, when applied to a mathematical formula, determines the amount of property taxes. The Commissioners meet as the local Board of Equalization to hear tax appeals. The Commissioners, along with the County Treasurer and Assessor, constitute a district boundary board for the purpose of revising the boundaries of school districts.

The County Commissioners grant liquor licenses within Park County. The Board makes the final decisions on changes in zoning and approves subdivisions. The Commissioners also address road issues and may establish, maintain, alter or vacate county roads. The Commissioners appoint members of the community to county-appointed boards such as Airport Board, Buffalo Bill Dam Visitor Center Board, Fair Board, Historic Preservation Commission, Library Board, Meeteetse Local Planning Area Advisory Committee, Museum Board, Parks & Recreation Board, Planning & Zoning Commission, Predator Management Advisory Board, Public Health Officer, Travel Council and Weed & Pest District Board. The Commissioners award three college scholarships and one renewal scholarship annually. The Board performs other such duties as prescribed by law.