List of numbered roads in Lambton County

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

Number	Names	Western/Southern Terminus	Eastern/Northern Terminus	Major Communities	Comments
1	Lambton Line	St. Clair Parkway	Highway 40	Port Lambton, Ontario
2	Bentpath Line	St. Clair Parkway	CR 79	Sombra, Ontario
4	Hill Street, Petrolia Line	St. Clair Parkway	CR 79	Corunna, Ontario, Petrolia, Ontario	Originally referred to locally as the 10th Line until the 1980s when regional government attempted to simplify local names for roads
5	Greenway Road	Highway 21	Ausable River (Middlesex-Lambton County Boundary)		Continues as Middlesex CR 5
6	Thomson Line	Highway 21	Ausable River (Lambton County/Middlesex County boundary)	Thedford, Ontario (1.5 km to the south)	Continues as Middlesex CR 7. Section from CR 79 to Ausable River was former Highway 7, turned back in 1998.
7	Christina Street, Lakeshore Road	Michigan Avenue	Highway 21	Point Edward, Ontario, Sarnia, Ontario, Brights Grove, Ontario, Errol, Ontario
8	Forest Road, Inwood Road, Shetland Road	Chatham-Kent CR 22 (Lambton Line, Boundary with Chatham-Kent	Interchange with Highway 21 and Highway 402 (Exit 34)	Inwood, Ontario
9	Northville Road	Intersection with CR 22 and CR 79	CR 79, 3 km northwest of Thedford	Thedford, Ontario	Has a short concurrency with CR 12
11	Aberarder Line	CR 7	Highway 21
12	Townsend Line	CR 7	Lambton-Middlesex Boundary (Continues as Middlesex CR 12	Forest, Ontario, Arkona, Ontario
14	Churchill Line	Intersection with Highway 40, CR 31, and CR 20	CR 21, 2 km south of Wyoming	Sarnia, Ontario, Lucasville, Ontario, Wyoming, Ontario
15	Dawn Mills Road	Kent Line (boundary with Chatham-Kent, continues as C-K CR 15)	CR 21 in Rutherford	Rutherford, Ontario	Provides a quick and direct bypass of Dresden, Ontario
16	London Road	Vidal Street (southbound) / Brock Street (northbound)	Interchange with Highway 40 and CR 22 (Continues as CR 22).	Sarnia, Ontario	Divided road underneath Highway 40 was original Highway 402 alignment, the "Bluewater Bridge Approach". Formerly part of Highway 7, turned back in 1982
17	Wellington Street	Vidal Street North (southbound) / Brock Street (northbound)	Highway 40	Sarnia, Ontario
18	Bog Line	CR 79	Ausable River (Boundary with Middlesex County, continues as Middlesex CR 18)	Port Franks, Ontario
19	Michigan Avenue, Michigan Line	CR 29	CR 27	Sarnia, Ontario
20	Plank Road	Intersection with Highway 40, CR 31, and CR 14	CR 4	Sarnia, Ontario, Lucasville, Ontario	This road travels the same distance north-south as it does east-west. This road is given an east-west trajectory to simplify things. Road was originally constructed in the late 19th century with wooden planks as the main traffic artery between Sarnia and Oil Springs.
21	Oil Heritage Road, Broadway Street,	Kent Line (Boundary with Chatham-Kent, Continues as C-K CR 21)	Interchange with CR 30 and Highway 402 (Exit 25)	Oil Springs, Ontario, Oil City, Ontario, Petrolia, Ontario, Wyoming, Ontario, Reece's Corners, Ontario	Formerly southern part of Highway 21, until all parts south of Highway 402 (and its concurrency with that road) were turned back in 1998. Has a small diversion just south of Wyoming. Original alignment is now residential street Canada Drive, and a second diversion south of Oil Springs (North Dawn Road).
22	London Line	Interchange with CR 16 and Highway 40 (continues as CR 16)	Sexton Road (Middlesex County Boundary)	Sarnia, Ontario	Formerly Highway 22 and Highway 7 from Highway 40 to Highway 79, now CR 79. Turned back in 1998.
23	Railroad Street, River Street	CR 79	CR 80	Alvinston, Ontario
25	Confederation Line	CR 8	Intersection of CR 79 and CR 39	Watford, Ontario
26	Mandaumin Road	Kent Line (Boundary with Chatham-Kent)	CR 7	Brights Grove, Ontario
27	Modeland Road	Interchange with Highway 40 and Highway 402	CR 7	Sarnia, Ontario
28	Holt Line	St. Clair Parkway	Highway 40
29	Indian Road	Highway 40	CR 7	Sarnia, Ontario
30	Oil Heritage Road	Interchange with CR 21 and Highway 402 (Exit 25)	CR 7	Reece's Corners, Ontario
31	Kimball Road	Kent Line (Continues into Chatham-Kent as CR 31	Intersection with Highway 40, CR 14, and CR 20	Kimball, Ontario, Lucasville, Ontario, Sarnia, Ontario
33	St. Clair Parkway	Whitebread Line (Boundary with Chatham-Kent, continues as C-K CR 33)	Intersection with Vidal Street and CR 34	Port Lambton, Ontario, Sombra, Ontario, Courtright, Ontario, Corunna, Ontario, Froomfield, Ontario, Sarnia, Ontario	Offers a nice scenic drive from Wallaceburg to Sarnia. Original Highway 40 alignment from May 2, 1934 until it was re-aligned 5 km inland in sections in 1971, 1975, and 1977. Turned back in sections: Sarnia to Sombra in 1979, the section from Sombra to Walpole Island was turned back in 1980, and the final section between Walpole Island and Wallaceburg was turned back in 1984
34	Churchill Line	Intersection with Vidal Street and CR 33	Intersection with Highway 40	Sarnia, Ontario	Formerly the original alignment of Highway 40 from May 2, 1934 until 1965, then renumbered as Highway 40B from 1965 to 1993. Minor re-alignment in 1975 when Vidal Street and Brock Street were made one-way streets.
35	La Salle Line	St. Clair Parkway	Highway 40	Froomfield, Ontario, Sarnia, Ontario
36	Bickford Line	St. Clair Parkway	Highway 40	Bickford, Ontario
39	Confederation Line	Intersection of CR 79 and CR 25	Sexton Road (Boundary with Middlesex County
79	Northville Road, Ravenswood Line, King Street, Main Street, Arkona Road, Egremont Road, Nauvoo Road, Aberfeldy Line, Cairo Road	Chatham-Kent CR 22 (Euphemia Line, Boundary with Chatham-Kent, continues as CR 16)	Highway 21 south of Port Franks, Ontario	Cairo, Ontario, Alvinston, Ontario, Watford, Ontario, Arkona, Ontario, Thedford, Ontario, Port Franks, Ontario	Section from CR 22 to Highway 21 was formerly Highway 21 from April 18, 1934 to 1938 (Concurrency with Highway 7. Section from Port Franks, Ontario to Thedford, Ontario was formerly Highway 82 from 1938 to 1981. Rest of the road was former Highway 79 from 1981 to April 1, 1997, then briefly as Highway 7 until that too was downloaded in 1998. Has a small diversion (Old Nauvoo Road)
80	Courtright Line	St. Clair Parkway	Junction Road (Boundary with Middlesex County)	Courtright, Ontario, Brigden, Ontario, Oil City, Ontario, Oil Springs, Ontario (3 km to the south), Inwood, Ontario (2 km to the north), Alvinston, Ontario (1 km to the north)	Formerly Highway 80