# List of county roads in LaSalle County, Illinois

The LaSalle County Highway System is a county-maintained system of arterial county highways in LaSalle 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 | Notes |
| CR 1 | 9.73 | 15.66 | US 52, IL 23 in Freedom Township | US 34 (Walter Payton Memorial Highway) in Earl Township | Wesley J. Freebairn Road | — | — | Passes through Harding |
| CR 2 | 14.13 | 22.74 | CR 21 in Wedron | South Gage Street in Northville Township | Hoxsey Road, Somonauk–Serena County Highway | — | — | Passes through Northville |
| CR 3 | 13.1 | 21.1 | IL 71 in Norway | LaSalle–DeKalb county line | | — | — | Passes through Sheridan |
| CR 4 | 10.1 | 16.3 | IL 71 in Rutland Township | LaSalle–Grundy county line | | — | — | |
| CR 5 | 32.0 | 51.5 | LaSalle–Putnam county line | LaSalle–Grundy county line | Spitzer Road, Gary Street, Leonore Road | — | — | Passes through Leonore |
| CR 6 | 21.9 | 35.2 | CR 8 in Deer Park Township | LaSalle–Grundy county line | Jack Daughterty Road, Mazon Road | — | — | Passes through Grand Ridge |
| CR 8 | 8.8 | 14.2 | IL 178 in Deer Park Township | IL 71 in South Ottawa Township | | — | — | |
| CR 9 | 15.5 | 24.9 | US 6 in Ottawa/Utica Townships | US 34 (Walter Payton Memorial Highway) in Earl/Meriden Townships | East 12th Road | — | — | Passes through Prairie Center |
| CR 10 | 4.1 | 6.6 | US 34 (Walter Payton Memorial Highway) in Meriden Township | LaSalle–Lee county line | East 7th Road | — | — | Passes through Meriden |
| CR 11 | 0.4 | 0.64 | CR 21 in Wedron | CR 2 in Wedron | East 2153th Road | — | — | Entirely within Wedron |
| CR 12 | 11.0 | 17.7 | IL 251 in Mendota Township | N Main Street in Earlville | North 46th Road | — | — | |
| CR 13 | 13.5 | 21.7 | US 6 in LaSalle | CR 19 in Troy Grove Township | East 4th Road, East 5th Road | — | — | Passes through Troy Grove |
| CR 14 | 3.6 | 5.8 | IL 251 in Tonica | IL 178 in Lowell | Ed Lambert Road | — | — | |
| CR 15 | — | — | LaSalle–Livingston county line | IL 71 in Rutland Township | | — | — | Passes through Marseilles and Kernan |
| CR 16 | 3.28 | 5.28 | IL 71 in Cedar Point | CR 63 in Peru Township | Ted Lambert Road | — | — |
| CR 30 | — | — | CR 6 in Brookfield Township | CR 15 in Fall River Township | | — | — | Passes through Marseilles |
| CR 33 | 15.10 | 24.30 | IL 251 in Dimmick Township | IL 23 in Dayton Township | East 1950th Road | — | — |
| CR 40 | 3.26 | 5.25 | IL 18 in Otter Creek Township | IL 170 in Allen Township | | — | — |
| CR 42 | 8.25 | 13.28 | US 6 in Ottawa | US 52 in Freedom Township | | — | — |
| CR 43 | 8.92 | 14.36 | I-80, IL 178 in North Utica | CR 19 in Triumph | East 8th Road | — | — |
| CR 44 | 28.05 | 45.14 | IL 251 in Groveland Township | IL 178, CR 14 in Lowell | Historic Illinois Route 179 | — | — | Passes through Leonore |
| CR 52 | 0.88 | 1.42 | Leland village limits | LaSalle–DeKalb county line | East 1950th Road | — | — |
| CR 54 | 5.87 | 9.45 | IL 71 in Cedar Point | IL 251 in Groveland Township | East 2nd Road, Ray Richardson Road | — | — | L-Shaped County Highway |
| CR 55 | 5.98 | 9.62 | Ottawa city limits | CR 15 in Fall River Township | Trumbo-Gentleman Road | — | — |
| CR 57 | — | — | CR 5 in Vermillion Township | CR 8 in South Ottawa Township | Ben Samek Road | — | — |
| CR 60 | 0.81 | 1.30 | Dana village limits | LaSalle–Livingston county line | North 2nd Road | — | — |
| CR 63 | 2.76 | 4.44 | LaSalle–Putnam county line | IL 251 in Peru Township | Ben Samek Road | — | — |
| CR 66 | 3.26 | 5.25 | IL 23 in South Ottawa Township | CR 15 in Fall River Township | | — | — |