List of numbered roads in Middlesex County, Ontario

This page lists all of the numbered county roads in Middlesex County, Ontario.

Note: when London became a separated municipality and absorbed Westminster Township, numbered County Roads in the township lost their designation. Many roads such as the former County Road 37 (Highland Avenue) are now named only.

Several roads near London were formerly provincial highways, but were not renumbered as County Roads when the highway designation was dropped.

• Highway 100: Airport Road (now "Veterans Memorial Parkway", proposed ring road around London.
• Highway 126: Highbury Avenue from Highway 401 (exit 189) to Fanshawe Park Road. The portion of Highbury Avenue from the Thames River to Highway 401 was once known as the Wenige Expressway.
• Highway 135: Exeter Road. Turned back after Highway 402 was completed and rendered the designation redundant.

The reason for this somewhat high concentration of former provincially controlled roads in this county is due to London's size (roughly 340,000), as it is the anchor for Southwestern Ontario, and Middlesex County is geographically quite large (by southern Ontario standards), and is quite important due to agriculture in the area.

Number	Names	Western/Southern Terminus	Eastern/Northern Terminus	Major Communities	Comments
1	Hagerty Road	Limerick Road (Boundary with Lambton County	Thames River (Boundary with Elgin County)	Wardsville, Ontario, Newbury, Ontario	Continues as Elgin CR 103
2	Longwoods Road, Wharncliffe Road, Dundas Street	Middlesex CR 14/Chatham-Kent CR 121 (Continues as Chatham-Kent CR 2)	Oxford County boundary (continues as Oxford CR 2)	Wardsville, Ontario, Melbourne, Ontario, Delaware, Ontario, Lambeth, Ontario, London, Ontario, Nilestown, Ontario, Dorchester, Ontario	Formerly Highway 2, has a concurrency with Highway 4 in London
3	Gideon Drive	CR 2	London, Ontario City limits	Delaware, Ontario, Kilworth, Ontario, London, Ontario	Passes by the Komoka Provincial Park
4	Hamilton Road	Thames River	CR 29	London, Ontario	No longer signed.
5	Greenway Drive, Grand Bend Road, Mount Carmel Drive	Ausable River (Boundary with Lambton County, continues as Lambton CR 5)	Highway 4	Greenway, Ontario, Corbett, Ontario, Mount Carmel, Ontario	Brief concurrency with CR 81 (Former Highway 81) for around 1 km, acts as the boundary with Perth County.
6	Kerwood Road	CR 10	CR 7	Keyser, Ontario, Kerwood, Ontario
7	Elginfield Road	Ausable River (Boundary with Lambton County, continues as Lambton CR 6)	Intersection with Highway 4 and Highway 7	Parkhill, Ontario, Ailsa Craig, Ontario, Elginfield, Ontario	Formerly part of Highway 7, until all parts west of Highway 4 were turned back in 1998.
8	Thames Road, Winter Drive	Thames River (Boundary with Elgin County, continues as Elgin CR 8)	CR 6	Ekfrid, Ontario, Appin, Ontario
9	Melbourne Road, Metcalfe Street	CR 39	Thames River (Boundary wit Elgin County, continues as Elgin CR 14)	Melbourne, Ontario, Longwood, Ontario, Strathroy, Ontario
10	Conservation Road, Gore Road, Calvert Drive, Carroll Street, Glengyle Drive	CR 80	CR 37	Cairngorm, Ontario, Strathroy, Ontario	Briefly acts as the boundary with Lambton County. Previously ended at CR 9, extended eastward in 2015.
10 (Original)	Robin's Hill Road (Formerly Wager Road)	CR 25	CR 27	London, Ontario, London International Airport, Fanshawe Conservation Area
11	Muncey Road	Muncey, Ontario	CR 2	Muncey, Ontario	Formerly continued along River Road to the Elgin County boundary, where it would continue as Elgin CR 20.
12	Townsend Line	Lambton County line, continues as Lambton CR 12	CR 81	Keyser, Ontario
13	William Street, Alice Street	CR 20	CR 47	Lucan, Ontario	Acts as a short connector to CR 20 from Lucan.
14	Glendon Drive, Dundonald Road, Concession Drive, Clachan Road	Thames River (Boundary with Elgin County, continues as Elgin CR 7/Chatham-Kent CR 121)	London City Limits	Newbury, Ontario, Appin, Ontario, Longwoods, Ontario, Glencoe, Ontario, Mount Brydges, Ontario, Komoka, Ontario, Kilworth, Ontario	Briefly acts as the boundary between Chatham-Kent and Middlesex County, has a brief concurrency with CR 80.
15	Carriage Road	CR 35	CR 2		Previously ended further south at Elgin County boundary
16	Komoka Road, Poplar Hill Road, Ilderton Road, Twelve Mile Road, Plover Mills Road	CR 3	Oxford County line (Continues as Oxford CR 25)	Komoka, Ontario, Poplar Hill, Ontario, Ilderton, Ontario, Plover Mills, Ontario	Travels northwest-southeast to Poplar Hill, then roughly east–west to Oxford County, has a concurrency with CR 20 for around 2 km, and with CR 27 for around 4 km.
17	Nairn Road, Gainsborough Road	CR 7	London city limits	Parkhill, Ontario (2 km to the north, along CR 7), Nairn, Ontario, Lobo, Ontario, Lobo Siding, Ontario, London, Ontario	Not related to Elgin CR 17, which is the border with Elgin County, in Southwold, Ontario, near London, Ontario
18	Parkhill Drive	Ausable River (Boundary with Lambton County)	CR 81	Parkhill, Ontario	Not to be confused with Elgin CR 18, which acts as boundary between Middlesex and Elgin Counties.
20	Hyde Park Road, Ilderton Road, Denfield Road	London city limits	Highway 4	London, Ontario, Ilderton, Ontario	Has a 2 km concurrency with CR 16. Formerly CR 22, until Highway 22 was downloaded in 1998, and was re-numbered.
21	Cassidy Road	CR 7	CR 24		Travels through no towns, acts as a connecting link between CR 7 and CR 24
22	Egremont Drive, Fanshawe Park Road	Sexton Road (Boundary with Lambton County, continues as Lambton CR 22)	London City Limits	Adelaide, Ontario, Strathroy, Ontario, Hickory Corner, Ontario, Poplar Hill, Ontario, Lobo, Ontario, Melrose, Ontario, London, Ontario	Section between London and Strathroy is extremely busy and congested, and only two-lanes. Whole route was formerly Highway 22.
23	Highbury Avenue	Intersection with CR 28	Highway 7	Ballymote, Ontario
24	McGillivray Drive	CR 81	Highway 4	Moray, Ontario, West McGillivray, Ontario	Connects two major routes, Highway 4 and CR 81 (Former Highway 81)
25	Gore Road	London City Limits	Oxford County line (continues as Road 64)	London, Ontario
25 (Original)	Crumlin Road, Crumlin Sideroad	Gore Road	London International Airport	London, Ontario	No longer signed
26	Wilton Grove Road	London City Limits	CR 74	London, Ontario	Less than 500 meters in length. Formerly extended to Interchange with Highway 135 (Exeter Road) and Highway 401 (Exit 186)). Formerly travelled down a brief segment of Wellington Road to the interchange. Formerly numbered as CR 37.
26 (Original)	Boler Road, Southdale Road	London City Limits (just north of Southdale Road)	CR 43	London, Ontario	No longer signed.
27	Nissouri Road, Plover Mills Road, Wellburn Road	CR 2	Highway 7 (Boundary with Perth County)	Wellburn, Ontario	Has a 4 km concurrency with CR 16
28	Medway Road, Thorndale Road, King Street	CR 20	Cobble Hills Road (boundary with Oxford County, continues as Oxford CR 16)	Arva, Ontario, Ballymote, Ontario, Thorndale, Ontario, Cobble Hill, Ontario	Skirts the northern edge of London, Ontario
29	Hamilton Road	London city limits	Oxford County boundary, continues as Oxford CR 9	London, Ontario, Nilestown, Ontario, Dorchester, Ontario, Putnam, Ontario
30	Putnam Road	Avon Drive (Elgin CR 45, boundary with Elgin County. Continues as Elgin CR 47)	Thames River (Boundary with Oxford County, continues as Oxford CR 45)	Putnam, Ontario
31	Heritage Road	CR 28	CR 16/27	Friendly Corners, Ontario
31 (Original)	Fanshawe Park Road	Intersection with CR 23 and Former Highway 22	Fanshawe Conservation Area	London, Ontario, Fanshawe, Ontario	No longer signed, incorporated into CR 22
32	Dorchester Road, Jane Street, Catherine Street, Shaw Road	Interchange with Highway 401 (Exit 199)	CR 2	Dorchester, Ontario	Has a 2.5 km concurrency with CR 49. Formerly routed along Hamilton Road and Bridge Street in Dorchester.
33	Second Street	CR 45	CR 39	Strathroy, Ontario	Passes through the northern limits of Strathroy. Extended westward past CR 81 in 2020. Together with CR 45, the segment west of CR 81 acts as a western bypass of Strathroy.
34	Highbury Avenue, Webber Bourne	CR 2	Elgin CR 30 on the border with Elgin County (Continues as Elgin CR 30).	London, Ontario	Very busy, freeway from north of Highway 401 (Exit 189), to Hamilton Road. Unknown if it is still signed as such. Formerly routed briefly along Hubrey Road until Highbury Avenue was extended.
35	Littlewood Drive, Westdel Bourne, Glanworth Drive	Oneida, Ontario	Highway 4	Littlewood, Ontario, Tempo, Ontario, London, Ontario	Formerly extended to Highway 74 in Belmont, Ontario. Extended west from CR 15 to Oneida Reserve boundary.
37	McEvoy Road	CR 10	CR 39	Strathroy, Ontario	Short county road running along the eastern limit of Strathroy, acts as a connecting link between CR 39 and the eastern terminus of CR 10. Assumed by the county in 2015
38	Vanneck Road	CR 10	CR 22	Kilworth, Ontario, Lobo Siding, Ontario	Basically, a spur of CR 14. Previously ended at CR 17, extended northward to CR 22 in 2007.
39	Napperton Drive, Albert Street, Metcalfe Street, Hickory Drive	Sexton Road (Boundary with Lambton County, continues as Lambton CR 39)	CR 22	Napperton, Ontario, Strathroy, Ontario, Hickory Corner, Ontario	Basically a continuation of Lambton CR 39
41	Adelaide Street	London City Limits	CR 16	London, Ontario
42	Clarke Road	London City Limits	Intersection with CR 28	London, Ontario, Ballymote, Ontario
43	White Oak Road, Scotland Drive	Glanworth Drive (Middlesex CR 35)	Southdale Road/London city limits	Glanworth, Ontario, London, Ontario	No longer signed
44	Victoria Street	CR 9	CR 81	Strathroy, Ontario	Offers a diversion from CR 81 to CR 9, and eventually CR 10 or CR 2
45	Pike Road	CR 9	CR 33	Strathroy, Ontario	Acts as a western bypass of Strathroy.
46	Westdel Bourne	Longwoods Road (Middlesex CR 2, Former Highway 2)	Oxford Street (Middlesex CR 14)	London, Ontario	No longer signed
47	Saintsbury Line, Fallon Drive	Highway 4	Highway 23	Lucan, Ontario
49	Catherine Street	London city limits	CR 73	Nilestown, Ontario, Dorchester, Ontario	Has a 2.5 km concurrency with CR 32
50	Prospect Hill Road	Highway 7	Whalen Line (Boundary with Perth County, continues as Perth CR 139)	Prospect Hill, Ontario	Short county road
51	Sarnia Road	CR 20	London city limits	Hyde Park, Ontario, London, Ontario	No longer signed.
52	Wonderland Road	Exeter Road	CR 26 (Southdale Road)	London, Ontario	No longer signed.
54	Base Line Road (Now Byron Baseline Road)	Westdel Bourne (Middlesex CR 46)	Wickerson Road	London, Ontario	No longer signed.
55	Roxburgh Road, Castleton Road	CR 37	Dingman Drive	London, Ontario	No longer signed.
56	Wonderland Road	London city limits	CR 16	London, Ontario	Very short county road
59	Granton Line	Intersection of Highway 7 and CR 23
73	Elgin Road	Avon Drive (Elgin Road 37, boundary with Elgin County. Continues as Elgin CR 73)	CR 2	Three Bridges, Ontario, Dorchester, Ontario, Mossley, Ontario, Harrietsville, Ontario	Portions south of CR 29 were Former Highway 73, which was turned back on January 1, 1998
74	Westchester Bourne	7th Avenue (Boundary with Elgin County, continues as Elgin CR 74)	CR 49	Nilestown, Ontario, Derwent, Ontario, Belmont, Ontario (on the other side of the Elgin County line)	Portions south of CR 29 were formerly Highway 74, turned back April 1, 1997
75	Bradley Avenue	London City Limits	CR 74		Assumed by the county in 2015
76	Pratt Siding Road	Thames River (Boundary with Elgin County, continues as Elgin CR 76)	CR 2	Woodgreen, Ontario	Formerly Highway 76, turned back in 1997. Connects Middlesex CR 2 to Elgin CR 76.
77	Murphy Drive	CR 6	CR 9		Short county road. Used to be CR 7, but renumbered when portions of Highway 7 were downloaded to County in 1998 west of Highway 4 and CR 7 designated was shifted.
78	Donnybrook Road	CR 74	CR 32	Dorchester, Ontario	Short county road. This road was first designated as a county road in 2021 thus it is the newest county road in the system. This road was most likely designated a county road due to connecting CR 32 and CR 74 and also it had a sudden spike in use due to a industrial park nearby
80	Dundonald Road, Courtright Line	Lambton County boundary (Continues as Lambton CR 80)	CR 2	Glencoe, Ontario	Formerly Highway 80, turned back in 1997
81	Adelaide Road, Caradoc Street, Victoria Street, Center Road, Elginfield Road, Main Street, Grand Bend Road	CR 2	CR 5 (Boundary with Huron County, continues as Huron CR 81	Delaware, Ontario, West Delaware, Ontario, Mount Brydges, Ontario, Caradoc, Ontario, Strathroy, Ontario, Parkhill, Ontario, Corbett, Ontario, Greenway, Ontario	Formerly Highway 81. Has a brief concurrency with CR 7.