# List of county roads in DeKalb County, Illinois

The DeKalb County Highway System is a county-maintained system of arterial county highways in DeKalb County, Illinois, United States. They are marked with the standard M1-6 pentagon-shaped highway marker on the base of traffic signals at intersections with other county highways. They are not marked on any freeway or tollway exits or signed with separate reassurance markers. In addition, although concurrencies of county highways exist in the county, they too are not explicitly signed as such.

## Route list

| Number | Length (mi) | Length (km) | Southern or western terminus | Northern or eastern terminus | Local names | Formed | Removed |
| CR 1 | — | — | IL 38 (Lincoln Highway) | IL 64 (State Street) | East County Line Road | — | — |
| CR 3 | — | — | CR 14 (Esmond Road) | IL 64 (State Street) | Old State Road | — | — |
| CR 4 | — | — | South DeKalb–LaSalle County | CR 11 (Suydam Road) | Leland Road | — | — |
| CR 5 | — | — | DeKalb–Sycamore city limits | CR 21 (Cherry Valley Road) | Glidden Road | — | — |
| CR 6 | — | — | South DeKalb–LaSalle county line | IL 38 (Lincoln Highway) | Rollo Road, Shabbona Road | — | — |
| CR 7 | — | — | West DeKalb–Ogle county line (West County Line Road) | East DeKalb–Kane county line (East County Line Road) | Perry Road | — | — |
| CR 9 | — | — | Duffy Road | CR 7 (Perry Road) | Waterman Road | — | — |
| CR 10 | — | — | US 34 (Walter Payton Memorial Highway) | IL 38 (Lincoln Highway) | Somonauk Road | — | — |
| CR 11 | — | — | CR 6 (Rollo Road) | Sandwich city limits | Suydam Road | — | — |
| CR 12 | — | — | Carol Avenue | Bethany Road | Somonauk Road | — | — |
| CR 13 | — | — | North DeKarb–Boone county line | Deer Creek Drive | Genoa Road | — | — |
| CR 14 | — | — | CR 3 (Old State Road) | Ch 20 (Lindenwood Road) | Esmond Road | — | — |
| CR 15 | — | — | IL 23 | East DeKalb–Kane county line (East County Line Road) | Plank Road | — | — |
| CR 16 | — | — | CR 6 (Shabbona Road) | CR 10 (Somonauk Road) | Chicago Road | — | — |
| CR 18 | — | — | North State Street | North DeKalb–McHenry county line (Poplar Road) | North State Road | — | — |
| CR 20 | — | — | West DeKalb–Ogle county line | CR 14 (Esmond Road) | Lindenwood Road | — | — |
| CR 22 | — | — | CR 33 (Rich Road, Coltonville Road) | IL 64 (State Street) | North 1st Street | — | — |
| CR 23 | — | — | CR 30 (West County Line Road) | CR 6 (Shabbona Road) | Lee Road | — | — |
| CR 24 | — | — | West DeKalb–Ogle county line (West County Line Road) | CR 6 (Rollo Road) | Chicago Road | — | — |
| CR 26 | — | — | IL 72 | CR 21 (Cherry Valley Road) | Five Points Road | — | — |
| CR 27 | — | — | IL 23 | CR 12 (Somonauk Road) | Barber Greene Road | — | — |
| CR 29 | — | — | IL 72 | North DeKalb–Boone county line (Crain Road) | Kirkland Road | — | — |
| CR 30 | — | — | US 30 | CR 23 (Lee Road) | West County Line Road | — | — |
| CR 31 | — | — | CR 3 (Old State Road) | IL 38 (Lincoln Highway) | Malta Road | — | — |
| CR 32 | — | — | CR 21 (Cherry Valley Road) | North DeKalb–Boone county line | Stone Quarry Road | — | — |
| CR 33 | — | — | CR 5 (Glidden Road) | West Stonehenge Drive | Rich Road, Coltonville Road | — | — |
| CR 34 | — | — | Pleasant Street | IL 23 (Main Street) | Peace Road | — | — |
| CR 35 | — | — | CR 7 (Perry Road) | Harvestore Drive | South 1st Street | — | — |