| Number | Names | Western/Southern Terminus | Eastern/Northern Terminus | Major Communities | Comments |
|---|
| 1 | Guelph Line | Interchange with Queen Elizabeth Way/Highway 403 (QEW Exit 102) | Eramosa-Milton Townline (boundary with Wellington County, Ontario, continues as Wellington CR 44) | Burlington, Milton, Campbellville | Passes by the Mohawk Raceway |
| 2 | Hornby Road | RR 8 | RR 3 | Hornby | Very short county road, original alignment of RR 3 before re-aligned to meet Highway 401 at the current interchange (Exit 328), and to eliminate a brief jog and concurrency with RR 8. |
| 3 | Trafalgar Road, Highway 7 | Interchange with Queen Elizabeth Way/Highway 403 (QEW Exit 118) | Intersection with Erin-Halton HIlls Townline, Wellington CR 24, and Wellington CR 42 (32nd SideRoad, boundary with Wellington County, continues as Wellington CR 24). | Oakville, Hornby, Georgetown | 4 km concurrency with Highway 7 in Georgetown |
| 4 | James Snow Parkway | RR 7 (soon to be extended to Highway 407 Exit 18) | RR 8 (soon to be extended to RR 25 just north of Milton) | Milton, Oakville (future) | Currently short, but extensions are planned, and the northern extension is already under construction. Planned southern terminus is an extended Neyagawa Boulevard, terminating at RR 5 (Dundas Street) in Oakville. |
| 5 | Dundas Street | Evans Road (boundary with the City of Hamilton (continues as Hamilton RR 5) | 9th Line (boundary with the Regional Municipality of Peel. Continues as Dundas Street. | Burlington, Oakville | Major artery in the southern part of Halton RM, quite busy at times. |
| 6 | Britannia Road | RR 22 | 9th Line (boundary with Peel RM, continues as Peel RR 3 | Milton | |
| 7 | Derry Road | Millburough Line (boundary with the City of Hamilton) | 9th Line (boundary with Peel RM, continues as Peel RR 5) | Kilbride, Milton | |
| 8 | Appleby Line, Steels Avenue | RR 9 | Winston Churchill Boulevard (Halton RR 25/Peel RR 19, boundary with Peel RM, continues as Peel RR 15) | Kelso, Milton | Brief concurrency with CR 25 |
| 9 | 5th Sideroad, Campbellville Road | Hamilton RR 559 (Milburough Line, boundary with the City of Hamilton) | RR 3 | Campbellville, Kelso, Milton, Milton Heights | |
| 10 | 10th Sideroad | RR 3 | Halton RR 25/Peel RR 19 | Georgetown, Norval | Passes along the southern edge of Georgetown |
| 11 | Maple Avenue | RR 3 | RR 13 | Georgetown | Passes through Georgetown's downtown and central business district |
| 12 | 25th Sideroad | CR 1 | CR 25 | Acton | |
| 13 | Mountainview Road, 9th Line | RR 8 | RR 23 | Georgetown | One of the main roads into Georgetown |
| 15 | Concession 11, 15th Sideroad | Concession 11 (boundary with Wellington County, continues as Wellington CR 36) | CR 3 | Georgetown | |
| 19 | Winston Churchill Boulevard, Adamson Street, King Street | Lakeshore Road in Oakville | Intersection with Wellington CR 42 (Boundary with Wellington County, continues as Peel RR 19/Wellington CR 25) | Terra Cotta, Norval, Georgetown, Oakville | Very busy road, named after Sir Winston Churchill, former British Prime Minister during the Second World War. Acts as the boundary between Peel RM and Halton RM. Discontinuous from CR 8 to Dundas Street (CR 5), as the Region line moves west and the road is fully in Peel RM (Mississauga). |
| 22 | Tremaine Road | CR 5 | CR 9 | Milton, Milton Heights | |
| 23 | River Drive, 10th Line, 17th Sideroad | CR 13 | Halton RR 25/Peel RR 19 (boundary with Peel RM) | Georgetown | |
| 25 | Bronte Road, Ontario Street, Steels Avenue, Martin Street, Main Street | Interchange with Queen Elizabeth Way (Exit 111) | Erin-Halton Hills Townline (boundary with Wellington County, continues as Wellington CR 125) | Burlington, Milton, Milton Heights, Acton | Formerly Highway 25. Has a brief concurrency with CR 8. Note: Peel RR 19 is also signed as Halton RR 25 on maps from the Region boundary to Terra Cotta (roughly 5 km). |
| 28 | Kelso Road, 3rd Sideroad | Kelso Conservation Area/Glen Eden ski resort | Peru Road | Milton, Kelso | Serves the Glen Eden ski resort. |
| 34 | 20th Sideroad | Concession 11 (boundary with Wellington County, continues as Wellington CR 34) | CR 1 | | Basically an extension of Wellington CR 34 |
| 38 | Upper Middle Road | RR 3 | Peel RR 19 (Winston Churchill Boulevard) | Oakville |
| 42 | Erin-Halton Townline | Intersection with Halton RR 3/Wellington CR 24 | Peel RR 19/Wellington CR 25 | | Wellington CR 42, acts as boundary between Wellington County and the Regional Municipality of Halton |
| 43 | 22nd Sideroad | CR 25 | Highway 7 | Acton, Limehouse, Georgetown | Passes by the Limehouse Conservation Area |
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