The 4th district consists of all or part of the following communities: Bellwood, Berkeley, Berwyn, Broadview, Brookfield, Chicago, Cicero, Countryside, Elmhurst, Forest Park, Hillside, Hinsdale, Hodgkins, Indian Head Park, La Grange, La Grange Park, Maywood, Melrose Park, North Riverside, Northlake, Oak Brook, Oak Park, Oakbrook Terrace, River Forest, Stone Park, Westchester, Western Springs and Westmont.