The Rock County Board of Supervisors operates under a committee system and county administrator form of government. 

• Meets twice monthly and on special occasions as required. 
• Exercises policy supervision of County activities through its committee system.
• Adopts the annual County Budget and establishes a tax rate for the support of County services. 

29 Supervisors are elected by district, for a two-year term, on a non-partisan basis.

• No county officer or employee is eligible to be a County Supervisor.
• A Supervisor may also be a member of a town board, city common council, or village board of trustees.