As long as you or your spouse has been an Illinois resident for six months, you can file at the court of the county where one of you lives. You can get the forms from the county clerk. It is important to understand that while filing for divorce is easy, it starts a process that can be very complex to manage. Preplanning can save you and your spouse a great deal of stress and expense. It’s always best to consult an experienced divorce attorney before taking any action.