This article lists all of the numbered regional roads in the Regional Municipality of Halton, Ontario, Canada.
| Number | Names | Western/Southern Terminus | Eastern/Northern Terminus | Major Communities | Comments |
|---|---|---|---|---|---|
| Guelph Line | Interchange with Queen Elizabeth Way/Highway 403 (QEW Exit 102) | Eramosa-Milton Townline (boundary with Wellington County, Ontario, continues as Wellington County Road 44 - 4th Line Concession) | Burlington, Milton, Campbellville | Passes by the Mohawk Raceway | |
| Trafalgar Road | Speers Road | Intersection with Erin-Halton Hills Townline, Wellington CR 24, and Wellington County Road 42 (32nd SideRoad, boundary with Wellington County, continues as Wellington County Road 24). | Oakville, Hornby, Georgetown | Very busy road which serves as the primary north-south artery of Oakville, and connects Oakville with Georgetown. Has a 4 km break northwest of Georgetown as Highway 7 is channelled along its baseline. | |
| Neyagawa Boulevard, James Snow Parkway | Halton Regional Road 38 (Upper Middle Road) | West of Halton Regional Road 25 | Milton, Oakville | Currently short, but extensions are planned, and the northern extension is already under construction. Named for former provincial cabinet minister James Snow. | |
| Dundas Street | Evans Road (boundary with the City of Hamilton; continues as Hamilton Regional Road 5) | 9th Line (boundary with the Regional Municipality of Peel) | Burlington, Oakville | Major artery in the southern part of Halton RM, quite busy at times. Continuation of Dundas Street in Peel and Toronto. | |
| Britannia Road | Halton Regional Road 22 (Tremaine Road) | 9th Line (boundary with Peel RM, continues as Peel Regional Road 3) | Milton | Formerly known as Number 5 Sideroad until January 1, 1967.[1] | |
| Derry Road | Milburough Line (boundary with the City of Hamilton) | 9th Line (boundary with Peel RM, continues as Peel Regional Road 5) | Kilbride, Milton | Formerly known as Number 10 Sideroad until January 1, 1967. | |
| Steeles Avenue | Halton Regional Road 22 (Tremaine Road) | Winston Churchill Boulevard (Halton RR 25/Peel Regional Road 19, boundary with Peel RM, continues as Peel Regional Road 15) | Milton | Brief concurrency with RR 25. Continuation of street from Peel and Toronto. Formerly known as Upper Base Line until January 1, 1967. | |
| Campbellville Road | Milburough Line (boundary with City of Hamilton, continues as Hamilton CR 518) | Halton Regional Road 1 (Guelph Line) | Milton (Campbellville) | ||
| 10th Sideroad | Halton Regional Road 3 (Trafalgar Road) | Halton RR 25/Peel RR 19 | Georgetown, Norval | Passes along the southern edge of Georgetown before merging with RR25 on the west end of Norval. | |
| Maple Avenue | Halton Regional Road 3 (Trafalgar Road) | Ninth Line | Georgetown | Passes through Georgetown's downtown and central business district | |
| Mountainview Road, 9th Line, Ford Drive | Halton Regional Road 8 (Steeles Avenue), Speers Road | Halton Regional Road 10 (10th Sideroad) | Oakville, Halton Hills | One of the main roads into Georgetown, discontinuous between Regional Road 8 and Regional Road 5 where Ninth Line is in the jurisdiction of the City of Mississauga | |
| Dorval Drive | Lakeshore Road | Halton Regional Road 38 (Upper Middle Road) | Oakville | ||
| Brant Street | Interchange with QEW | Halton Regional Road 5 (Dundas Street) | Burlington | Named for Joseph Brant. | |
| 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 | Shared regional road with Peel Region, but signed as Peel RR19 only. 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 Steeles Avenue (RR 8) to Dundas Street (RR 5), as the Region line moves west and the road is fully in Peel RM (Mississauga). Formerly known as East Town Line until January 1, 1967. | |
| Appleby Line | Interchange with Queen Elizabeth Way | Halton Regional Road 7 (Derry Road) | Burlington | ||
| Burloak Drive, Upper Middle Road | Interchange with QEW | Halton Regional Road 20 (Appleby Line) | Oakville, Burlington | Burloak and Tremaine were formerly known as West Town Line until January 1, 1967. | |
| Tremaine Road | Halton Regional Road 5 | 5th Sideroad | Milton, Milton Heights | Intersection at Steeles being re-routed with traffic circle further west. Burloak and Tremaine were formerly known as West Town Line until January 1, 1967. Current Tremaine Road overpass will be re-located to the east with an interchange and to align with re-routing of road south of the 401 along with the closure of Peru Road north of the 3rd Side Road (and future re-alignment of Dublin Line north of 401).[2] | |
| Milburough Line | Halton Regional Road 7 (Derry Road) | Kilbride | |||
| Bronte Road, Ontario Street, Steeles Avenue, Martin Street, Main Street | Speers Road | Erin-Halton Hills Townline (boundary with Wellington County, continues as Wellington County Road 125) | Burlington, Milton, Milton Heights, Acton | Formerly Highway 25. Has a brief concurrency with RR 8. Note: Peel Regional Road 19 is also signed as Halton RR 25 on maps from the Region boundary to Terra Cotta (roughly 5 km). | |
| Burnhamthorpe Road | Halton Regional Road 25 | Halton Regional Road 13 | Oakville | Continuation of street in Peel and Toronto. It was previously called Back Concession Road in Halton County until its name was changed to Burnhamthorpe on January 1, 1967. | |
| 32nd Sideroad | Fourth Line | Boundary with Wellington County | |||
| 20th Sideroad | Concession 11 (boundary with Wellington County, continues as Wellington County Road 34) | Halton Regional Road 1 (Guelph Line) | Continuation of Wellington County Road 34 | ||
| Upper Middle Road | Brant Street | Peel Regional Road 19 (Winston Churchill Boulevard) | Burlington, Oakville | ||
| William Halton Parkway | Halton Regional Road 25 (Bronte Road) | Ninth Line | Oakville | Partial bypass of Halton Regional Road 27 (Burnhamthorpe Road), with extension planned. Opened November 2020.[3] | |