Senate District 4
| County | Cities and Villages | |||
| Cook | Bellwood | La Grange | Westchester | |
| Berkeley | La Grange Park | Western Springs | ||
| Townships | Berwyn | Maywood | ||
| Berwyn | Broadview | Melrose Park | ||
| Lyons | Brookfield | North Riverside | ||
| Oak Park | Chicago | Northlake | ||
| Proviso | Elmhurst | Oak Brook | ||
| River Forest | Forest Park | Oak Park | ||
| Riverside | Hillside | River Forest |
Not sure whether or not you live in the district? Visit the State Board of Elections website to find out.