Under Wisconsin law, authority over wind energy facilities is generally split between state and local governments. While the state’s Public Service Commission (PSC) reviews the siting of large electric generating facilities (i.e., facilities with a capacity of 100 megawatts or greater), smaller facilities are primarily regulated at the local level. However, this local authority is subject to various limitations created under 2009 Wisconsin Act 40. This issue brief discusses the regulatory framework established under this act, the resulting PSC wind siting rules, and the PSC’s review of electric generating facilities.