Number | Names | Western/Southern Terminus | Eastern/Northern Terminus | Major Communities | Comments |
| McDowell Road, West Street, Talbot Street, Robinson Street | County Highway 59 | County Highway 24 | Pinegrove, Blayney, Green's Corners, Bill's Corners, Hillcrest, Simcoe | |
| St. John's Road | CR 16 | Haldimand County Border (Continues as Haldimand Road 3) | Walsh | |
| Church Street, Brantford Road | Highway 3 | Brant County Border (Continues as Brant Road 4) | Delhi, Vanessa | |
| Chapman Street, Silver Lake Drive, Cockshutt Road | County Highway 6 | Brant County Border (Continues as Brant Road 44) | Port Dover, Renton, Boston | |
| Windham Centre Road, Thompson Road | CR 4 | Haldimand County Border (Continues as Haldimand Road 9) | Windham Centre, Waterford, Villa Nova | |
| Turkey Point Road | Cedar Drive (Turkey Point) | Highway 3 | Walsh, Turkey Point | |
| | Highway 3 | Oxford County Border (Continues as Oxford Road 13) | Courtland | |
| Forestry Farm Road, Rhineland Road | Waterfront at Booth's Harbour | Highway 3 | St. Williams | |
| | Oxford County Border (Continues as Oxford Road 19) | Haldimand County Border (Continues as Haldimand Road 19) | Bookton, Vanessa, Boston | |
| Indian Line Road | Brant County Border (Continues as Brant Road 20) | Haldimand County Border (Continues as Haldimand Road 20) | | |
| Lynedoch Road | CR 23 | Highway 3 | Glen Meyer, Andy's Corners, Wyecombe, Lynedoch | |
| | CR 42 | CR 38 | Glen Meyer | |
| "Old Highway 24" | Highway 24 | Brant County Border (Continues as Brant Road 24) | Bloomsburg, Waterford, Wilsonville | |
| Nixon Road, Teeterville Road, Kelvin Road | Highway 3 | Brant County Border (Continues as Brant Road 25) | Nixon, Windham Centre, Teeterville, Kelvin | |
| | CR 42 | CR 23 | Fairground | |
| | CR 38 | County Highway 19 | Mabee's Corners | |
| Queen Street | CR 1 | Highway 3 | Simcoe | This county road is unsigned; however appears on county maps |
| Hunt Street, Second Avenue | Highway 3 | Highway 24 | Simcoe | |
| Swimming Pool Road | Highway 3 | Oxford County Border (Continues as Oxford Road 37) | Delhi | |
| Colonel Talbot Road | Elgin County Border (Continues as Elgin Road 38) | Highway 3 | Courtland | |
| Park Road, 14th Street | Highway 3 | Highway 24 | Simcoe | |
| Hillcrest Road | CR 1 | Highway 3 | Simcoe | |
| Lakeshore Road | Elgin County Border | CR 16 | Houghton, Clear Creek, Port Rowan, St. Williams | |
| | Elgin County Border | CR 16 | Frogmore | |
| Pinegrove Road | CR 21 | Highway 3 | Gilbertville, Pinegrove | |
| Simcoe Street | Oxford County Border (Continues as Oxford Road 51) | Highway 3 | | Formerly Highway 3B |
| Port Ryerse Road | Lake Erie Shoreline | County Highway 24 | Port Ryerse | |
| Fisher's Glen Road | County Highway 24 | Old Brock Street/Vittoria Road | Vittoria | |
| | CR 23 | County Highway 59 | | |
| La Salette Road | CR 37 | Windham Road 19 | La Salette | |
| | Highway 3 | CR 9 | | |