USA has a great tool to find out corruption in your state.
In the story they state that North Dakota is the most corrupt, but it is based on a formula of per 100,000 population and doesn't really address how adept and aggressive the state is in rooting out corruption
Below is Illinois and Ohio and surrounding states
Ohio - 547 convictions
Illinois - 502 convictions
Indiana - 123 convictions
Michigan - 215 convictions
Pennsylvania - 555 convictions
Kentucky - 242 convictions
West Virginia - 74 convictions
Michigan and West Virginia seem kinda low, but it is interesting that Ohio has more convictions than Illinois.
Is Ohio better at rooting out corruption or does Illinois just have smarter and more experienced criminals in office that can avoid indictment? I would assume that Illinois could convict over a thousand just from the Chicago - Gary corridor. Maybe the judges are on the take as well.