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.[1]
	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.[1]
	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.
Peel Regional Road signs used	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.[1]
	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.[1]
	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.[1] 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.[1]
	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]