A list of current and former county roads in Simcoe County, Ontario, Canada.

The table below lists all currently existing county roads in commission.^[1]

County road #	Local name(s)	Western/northern terminus (&)	Eastern/southern terminus (&)	Cities it passes by (within Simcoe County)	Additional notes/traffic
	8th Line; Main Street	Simcoe County / Dufferin County Boundary	Simcoe County Road 27	New Tecumseth; Bradford West Gwillimbury; Adjala–Tosorontio	Continues west as Dufferin County Road 7. Continues east as Bradford West Gwillimbury 8th Concession.
	Shores Acres Drive	Simcoe County Road 4	Simcoe County Road 39	Innisfil
	Barrie Street; Yonge Street	Mapleview Drive East	Line 8	Bradford West Gwillimbury; Innisfil	Formerly part of Ontario Highway 11 Extension of the original Yonge Street. CR 4 does not extend through Bradford to meet up with the northern terminus of York Regional Road 1 (the southward continuation of former Highway 11), which causes confusion to some drivers following the former highway.
	Simcoe County Road 5; Main Street Everett	Mulmur Tosorontio Townline Road/Dufferin County Road 17 Intersection (Simcoe County/Dufferin County Boundary)	Simcoe County Road 15	Everett, Adjala-Tosorontio
	Simcoe County Road 6	Lafontaine Road	Simcoe County Road 27	Wyevale, Perkinsfield, Tiny
	Simcoe County Road 7	Wasaga Beach/Clearview Boundary	Ontario Highway 26	Clearview
	Simcoe County Road 9; Louisa Street	Simcoe County Road 124/Grey County Road 124	Simcoe County Road 10	New Lowell, Creemore, Springwater, Clearview, Cashtown Corners, Dunedin
	Queen Street; Tottenham Road; Mill Street; Brentwood Road; Sunnidale Road	Wasaga Beach/Clearview Boundary	Highway 9	New Tecumseth; Essa; Clearview	Road is split into 2 portions. First portion goes from Highway 9 to Simcoe County Road 90 in Angus. Follow Simcoe County Road 90 east to access the second portion from Simcoe County Road 90 to Wasaga Beach
	Old Barrie Road	Simcoe County Road 93	Ontario Highway 11/Ontario Highway 12 South interchange	Orillia, Oro–Medonte
	Simcoe County Road 12; Main Street Lisle	Mulmur-Tosorontio Townline (Simcoe County/Dufferin County Boundary)	Simcoe County Road 13	Adjala-Tosorontio, Lisle, Airlie	Originally had an eastern terminus of Canadian Forces Base Borden
	Simcoe County Road 13	Main Street Lisle	Ontario Highway 89	Everett, Lisle, Adjala-Tosorontio
	5th Line	Simcoe County Road 50	Ontario Highway 400	New Tecumseth; Adjala–Tosorontio;Bradford West Gwillumbury	Original Eastern terminus of Simcoe County Road 10. New Eastern terminus became Highway 400 when new interchange between Highway 400 and Line 5 opened December 19, 2018. Road separated in two portions. 1st portion runs from County Road 50 to County Road 10. Second portion runs from County Road 27 to Highway 400.
	King Street North	Canadian Forces Base Borden	Ontario Highway 89	Essa
	Simcoe County Road 16	Highway 12/Highway 400 Interchange	Highway 12/Sturgeon Bay Road Intersection	Tiny, Coldwater, Waubaushene	Former Route of Highway 12 before it ran concurrent with Highway 400 between Exits 141 and 147
	Upper Big Chute Road; River Street	Big Chute Marine Railway Crossing (Simcoe County/Muskoka Region Boundary)	Sturgeon Bay Road, Coldwater	Severn Falls, Coldwater, Severn Township
	Queen Street East; South Orr Lake Road; Moonstone Road	Simcoe County Road 27	Ontario Highway 12	Moonstone, Orr Lake, Elmvale, Oro-Medonte, Springwater	Continuation of CR 92
	Shanty Bay Road; Ridge Road; Oro-Medonte Line 11	Barrie/Oro-Medonte Town Boundary	Ontario Highway 11	Oro–Medonte
	Innisfil Beach Road; Robert Street; Murphy Road	Simcoe County Road 15	20th Sideroad	Innisfil	Road is split into 2 portions. First portion is from Simcoe County Road 15 to Simcoe County Road 27 in Thornton. Follow Simcoe County Road 27 north to access second portion of road from Simcoe County Road 27 to Simcoe County Road 39.
	Horseshoe Valley Road	Ontario Highway 26	Ontario Highway 12	Springwater; Oro-Medonte	Horseshoe Valley Road is considered Horseshoe Valley Road West from Highway 26 to Simcoe County Road 93 and is Horseshoe Valley Road East from Simcoe County Road 93 to Highway 12.
	Vasey Road	Ontario Highway 93	Ontario Highway 400/Ontario Highway 12	Waverley, Vasey, Coldwater, Tay, Oro-Medonte	Runs along the border of Tay Township and Oro-Medonte Township
	Balm Beach Road	Simcoe County Road 6	Simcoe County Road 93	Midland, Tiny, Perkinsfield
	Lafontaine Road	Cedar Point Road	Robert Street West (Penetanguishene/Tiny Township Town Boundary)	Penetanguishene, Lafontaine, Tiny
	Highway 27	Ontario Highway 93	Highway 9	New Tecumseth; Bradford West Gwillimbury; Innisfil; Essa; Elmvale	Former Hwy. 27. Split into 2 portions. First portion from Highway 9 to Simcoe County Road 90. Second portion is from Midhurst (Bayfield Street/Highway 26 intersection) to Waverley.
	George Johnston Road	Highway 26	Simcoe County Road 90	Springwater
	Crossland Road	Horseshoe Valley Road	Concession Road 4 W, Tiny Township	Crossland, Allenwood, Gibson, Springwater
Simcoe Road 32	Sixth Street, Poplar Sideroad, Nottawasaga Concession 10 North	Simcoe County Road 34/Grey County Road 19 (Simcoe County/Grey County Boundary)	Ontario Highway 26	Clearview, Collingwood
	Osler Bluff Road	Highway 26	Grey County Road 19/Collingwood Clearview Townline intersection		Follows boundary between Simcoe County and Grey County. Concurrently known as Grey County Road 19
	Sunnidale Road; Pinegrove Road	Simcoe County Road 90	Barrie/Springwater Town Boundary	Springwater	Road was shortened in distance when County Road 90 was widened to five lanes and to accommodate new traffic light controlled intersection at County Road 56.
	Airport Road (Former)	Highway 26	Simcoe County/ Dufferin County Boundary		Links Simcoe County with Toronto Pearson International Airport. One of the busiest rural roads in Simcoe County.
	Snow Valley Drive	George Johnston Road	Highway 26	Springwater
Simcoe Road 44	Rama Road	Simcoe County Road 169	Highway 12	Rama
Simcoe Road 45	Monck Road	Rama Road	Simcoe County Road 46; Simcoe County/Kawartha Lakes Boundary	Ramara
Simcoe Road 46	Kirkfield Road; Simcoe County Road 46	Simcoe County Road 169	Simcoe County/Kawartha Lakes Boundary	Ramara
Simcoe Road 47	Mara Carden Boundary Road; Simcoe County Road 47	Ontario Highway 12	Simcoe County/Kawartha Lakes Boundary	Ramara
Simcoe Road 49	Memorial Avenue	Ontario Highway 11/Oro-Medonte Line 15 Interchange	Woodland Drive (Orillia/Oro-Medonte Boundary)	Oro–Medonte; Orillia
	Simcoe County Road 50	Ontario Highway 89	Highway 9, or the Simcoe County/Peel Region Boundary	Adjala–Tosorontio	Formerly Highway 50.
Simcoe Road 52	Coopers Falls Road	Ontario Highway 11	Simcoe County/Kawartha Lakes Boundary	Ramara	Continues as Kawartha City Road 6
Simcoe Road 53	Wilson Drive; Ferndale Drive North; 5th Sideroad Innisfil; 5th Sideroad Bradford West Gwillimbury	Ontario Highway 26	Simcoe County Road 88	Springwater, Bradford West Gwillimbury, Innisfil	Road split into two portions. First portion runs from Ontario Highway 26 to Barrie/Springwater town boundaries. Second portion runs from Barrie/Innisfil town boundaries to Simcoe County Road 88.
Simcoe Road 54	Huronia Road, 10th Sideroad	Barrie/Innisfil Townline	8th Concession	Bradford West Gwillimbury, Innisfil
Simcoe Road 56	Simcoe County Road 56	Simcoe County Road 90	Ontario Highway 89	Essa
Simcoe Road 58	Old Fort Road	Ontario Highway 12	Vasey Road	Vasey, Tay
Simcoe Road 64	30/31 Sideroad Nottawasaga	Ontario Highway 26	Site 10 Nottawasaga Landfill	Clearview
	Simcoe County Road 88	Simcoe County Road 27	10th Sideroad	Bradford West Gwillimbury	Formerly Ontario Highway 88
	Simcoe County Road 89	Highway 400	Simcoe County Road 4	Innisfil	Extension of Ontario Highway 89
	Mill Street; Simcoe County Road 90	Mill Street/Canadian Forces Base Borden	Barrie/Essa Town Boundary	Essa	Formerly Ontario Highway 90
	Simcoe County Road 91	Simcoe County Road 95/Grey County Road 31(Grey County/Simcoe County Boundary)	Ontario Highway 26	Stayner, Duntroon, Clearview	Formerly Ontario Highway 91 for portion between Stayner and Duntroon
Simcoe Road 92	Simcoe County Road 92; Queen Street	Wasaga Beach/Springwater Boundary	Simcoe County Road 27	Wasaga Beach, Springwater, Elmvale	Formerly Highway 92. Highway 92 continued west through Wasaga Beach and terminated at Highway 26. Continues east as CR 19
Simcoe Road 93	Penetanguishene Road	Robert Street	Springwater/Oro-Medonte/Barrie Townline	Springwater, Midland, Dalston, Penetanguishene, Craighurst	Formerly Ontario Highway 93, Split into 2 sections (First Section from Barrie to Highway 400/Highway 93 interchange, Second portion from Highway 12 to Penetanguishene)
Simcoe Road 95	Osprey-Clearview Townline Road	Grey County Road 31/Osprey-Clearview Townline Road intersection	Simcoe County Road 124/Grey County Road 124	Clearview	Follows Simcoe County/Grey County Boundary. Concurrently labeled as Grey County Road 31.
Simcoe Road 96	Nottawasaga Sideroad 27/28	Ontario Highway 26	Simcoe County Road 7	Clearview
	Simcoe County Road 124, Hurontario Street	Collingwood/Clearview Boundary	Nottawasaga/Mulmur Townline Road, Dufferin County (Simcoe County/Grey County/Dufferin County Boundary)	Collingwood, Duntroon, Nottawa, Clearview, Singhampton	Formerly Ontario Highway 24, shares portion of road between Singhampton and Nottawasaga/Mulmur Townline with Grey County (Concurrently labeled as Simcoe County Road 124/Grey County Road 124).
Simcoe Road 169	Simcoe County Road 169	Ontario Highway 11	Ontario Highway 12	Washago	Formerly Ontario Highway 169.

The following table list county roads that once existed, but were decommissioned, and transferred to local municipalities.

County road #	Local name(s)	Western/northern terminus (&)	Eastern/southern terminus (&)	Cities it passes by (within Simcoe County)	Additional notes/traffic
	Canal Road	South of Grencer Road	Highway 9	Bradford West Gwillimbury	Downloaded to the town of Bradford West Gwillimbury sometime in the 2010s. Old signage for the route can still be found on the road.
	West Street;Burnside Line			Orillia; Port Severn
Simcoe Road 24	Big Bay Point Road	20th Sideroad	25th Sideroad	Innisfil
Simcoe Road 30	Essa Road	Athabaska Road	Simcoe County Road 27	Barrie;	Downloaded to the expanded city of Barrie as of January 1, 2010.,[2] No longer signed as Simcoe County Road 30.
Simcoe Road 33	Nottawasaga Sideroad 33/34	Simcoe County Road 34/Grey County Road 19 (Simcoe County/Grey County Boundary)	Simcoe County Road 124	Clearview	Decommissioned and no longer signed as Simcoe County Road 33
Simcoe Road 37	Talbot Street	Paradise Point	Highway 12	Port McNicoll	Decommissioned. Formerly the access road to Port McNicoll from Ontario Highway 12
Simcoe Road 38	South Sparrow Lake Road		Highway 11	Orillia; Port Severn;	Decommissioned. Only indication that road was formerly a county road is signage on Ontario Highway 11
	20th Sideroad	Simcoe County Road 21	Shore Acres Road	Innisfil
Simcoe Road 41	Simcoe Road	6th Concession	Canal Road	Bradford West Gwillimbury
Simcoe Road 51	Talbot Road	Talbot River bridge (terminus of Durham Regional Road 51 / Talbot Road)	Concession Road A	Brechin, Ontario	Road was the former route of Ontario Highway 12
Simcoe Road 55	15th Sideroad New Tecumseth		Ontario Highway 9	New Tecumseth	No longer signed. Only indication that road was formerly a county road is signage on Ontario Highway 9.
Simcoe Road 57	Oro–Medonte Line 3			Oro–Medonte	Often referred to as Gasoline Alley, for there are many gas stations and pumps along the intersection of this road and Highway 11
Simcoe Road 59	Quarry Road	Ontario Highway 400			No longer signed. Only indication that road was formerly a county road is signage on Ontario Highway 400
Simcoe Road 60	River Road East, Tiny Beaches Road South, Concession Road 4 West	Main Street, Wasaga Beach	Simcoe County Road 6	Wasaga Beach, Tiny	Former county road, no longer signed. Some GPS systems may still refer to road(s) as County Road 60