While Illinois does not have a model wind ordinance* in place, it has established a maximum setback limit for wind turbines.** State law has established that no municipality or county government may require a wind turbine (or other renewable energy system) used for onsite energy generation to be setback more than 1.1 times the height of the system from the end user's property line.
The [http://www.illinoiswind.org/ Illinois Institute for Rural Affairs] offers a database of county ordinances and zoning laws related to wind.
*''Typically, model wind ordinances address more than just setback limits, and may also include guidance/recommended policies regarding multiple turbines, lot sizes, sound, insurance, aesthetics, and height, among others.''
**''The law specifies wind turbines as well as "other renewable energy system," but in practice this limit will apply to wind turbines for onsite generation and use.''