Illinois State Route 56 cuts east-west across Du Page County. This is one of the heavly traveled east-west surface highways in the county. IL St Rt 56 passes through the following towns in Du Page County. Aurora
Warrenville
Wheaton Downers Grove Lombard
Oak Brook
Oak Brook Terrace
Elmhurst
IL St Rt 56 is not multi-plexed in Du Page County. IL St Rt 56 intersects the following highways in Du Page County. Illinois State Route 59, at Warrenville.
EB IL St Rt 56 near the Elgin, Joliet, & Eastern underpass in Warrenville. EB IL St Rt 56 east of IL St Rt 59 in Warrenville. A junction marker on NB IL St Rt 53. Overhead sign on NB I-355 in Downers Grove. A BGS on NB Highland Ave. EB IL St Rt 56 in Oak Brook Terrace. Sign assembly on the ramp from IL St Rt 38 to IL St Rt 56 in Oakbrook Terrace. A BGS on NB IL St Rt 83. A BGS on EB IL St Rt 38. A junction marker on EB IL St Rt 38. Looking east along IL St Rt 56 at York Road. Looking west near the Cook/Du Page County Line.
