Wis. Stat. § 59.01: Body corporate; status.

Each county in this state is a body corporate, authorized to sue and be sued, to acquire and hold, lease or rent real and personal estate for public uses or purposes, including lands acquired under ch. 75, to sell, lease and convey the same, including the authority to enter into leases or contracts with the state for a period of years for the uses and purposes specified in s. 23.09 (2) (d), to make such contracts and to do such other acts as are necessary and proper to the exercise of the powers and privileges granted and the performance of the legal duties charged upon it.