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La liste des routes de l'Ontario recense toutes les routes provinciales de l'Ontario, au Canada, qui sont sous la responsabilité du Ministère des Transports de l'Ontario.
Le tableau suivant présente les routes provinciales numérotées entre 1 et 199 :
Route
|
Nom
|
Début
|
Fin
|
Longueur
(km)
|
|
|
Gananoque JCT
|
Gananoque,
|
1.1
|
|
Talbot Trail
|
Windsor
|
Fort Erie
|
261
|
|
|
St. Thomas, JCT
|
Clinton, JCT
|
101
|
|
|
Dundas, JCT
|
Waterdown, JCT
|
13
|
|
Garafraxa Road
|
Port Dover
|
Baldwin, JCT
|
480
|
|
|
Elginfield, JCT
|
Norval
|
153
|
Markham
|
Kanata, JCT
|
384
|
|
|
Port Perry, JCT
|
Peterborough, JCT
|
48
|
|
|
Goderich, JCT
|
Dundas, JCT
|
139
|
|
|
Kincardine, JCT
|
Harriston, JCT
|
73
|
Orangeville, JCT
|
Newmarket, JCT
|
46
|
|
Hurontario Street
|
Caledon, JCT
|
Owen Sound, JCT
|
136
|
|
|
Cochrane
|
Barrie, JCT
|
1 780
|
|
|
Brooklin
|
Midland, JCT
|
145
|
|
|
Kingston, JCT
|
Carleton Place, JCT
|
113
|
|
|
Prescott
|
Prescott, JCT
|
4
|
|
Route Transcanadienne
|
Kenora, JCT
|
Arnprior, JCT
|
1 964
|
|
Kenora Bypass
|
Keewatin, JCT
|
Kenora, JCT
|
34
|
|
|
Tillsonburg, JCT
|
Ingersoll, JCT
|
24
|
|
Lundy's Lane
|
Allanburg, JCT
|
Niagara Falls
|
2
|
|
Bluewater Highway
|
Wyoming, JCT
|
Owen Sound, JCT
|
227
|
|
|
Elginfield, JCT
|
Owen Sound, JCT
|
98
|
|
|
Simcoe, JCT
|
Cambridge
|
65
|
|
|
Owen Sound, JCT
|
Barrie, JCT
|
116
|
|
|
Peterborough, JCT
|
Denbigh, JCT
|
163
|
|
Loyalist Parkway
|
Bloomfield, JCT
|
Kingston
|
61
|
|
|
Vankleek Hill, JCT
|
Hawkesbury, JCT
|
17
|
|
|
Newcastle, JCT
|
Algonquin Park, JCT
|
196
|
|
|
Belleville, JCT
|
Actinolite, JCT
|
44
|
|
|
Chatham-Kent, JCT
|
Sarnia, JCT
|
92
|
|
|
Kaladar, JCT
|
Pembroke, JCT
|
161
|
|
Markham Road
|
Markham
|
Beaverton, JCT
|
63
|
|
|
Comté de Prince Edward
|
Tyendinaga
|
6
|
|
|
Port Colborne, JCT
|
Welland, JCT
|
7
|
Allanburg, JCT
|
Thorold, JCT
|
8
|
|
Townline Tunnel
|
Welland, JCT
|
Welland, JCT
|
4
|
|
Frank A. McDougall Parkway
|
Huntsville, JCT
|
Renfrew, JCT
|
256
|
|
|
Neebing
|
Thunder Bay, JCT
|
61
|
|
|
Bloomfield, JCT
|
Maynooth, JCT
|
166
|
|
|
North Bay
|
Thorne, JCT
|
64
|
|
|
Rutter, JCT
|
Marten River, JCT
|
145
|
|
|
Matachewan, JCT
|
Casey, JCT
|
123
|
|
Route Transcanadienne
|
Matachewan
|
Larder Lake, JCT
|
102
|
|
|
Porquis Junction, JCT
|
Iroquois Falls
|
11
|
|
Route Transcanadienne
|
MacTier, JCT
|
Sudbury, JCT
|
198
|
|
Route Transcanadienne
|
Fort Frances
|
Kenora, JCT
|
194
|
|
|
Dinorwic, JCT
|
Sioux Lookout
|
69
|
|
|
Leamington, JCT
|
Comber, JCT
|
23
|
|
|
Kitchener
|
St. Jacobs
|
10
|
|
|
Harriston, JCT
|
Cookstown, JCT
|
107
|
|
|
Barrie, JCT
|
Midland, JCT
|
24
|
|
|
Callander
|
Corbeil, JCT
|
12
|
|
|
Wawa, JCT
|
Black River-Matheson, JCT
|
473
|
|
|
Sistonens Corners, JCT
|
Thunder Bay, JCT
|
33
|
|
|
Vermilion Bay, JCT
|
Red Lake
|
174
|
|
|
Serpent River, JCT
|
Elliot Lake
|
42
|
|
|
Tarzwell, JCT
|
Kirkland Lake, JCT
|
20
|
|
|
Newcastle, JCT
|
Peterborough, JCT
|
57
|
|
|
Bracebridge, JCT
|
Bancroft, JCT
|
128
|
|
|
Parry Sound, JCT
|
Sundridge, JCT
|
75
|
|
|
Red Lake, JCT
|
Cochenour
|
14
|
|
|
Maynooth, JCT
|
Whitney, JCT
|
39
|
|
|
Thessalon, JCT
|
Chapleau
|
221
|
|
|
Thunder Bay, JCT
|
Thunder Bay, JCT
|
15
|
|
|
Dacre, JCT
|
Renfrew, JCT
|
30
|
|
|
Leeds and the
Thousand Islands
|
Leeds and the
Thousand Islands, JCT
|
4
|
|
|
Cornwall
|
Casselman, JCT
|
39
|
|
|
Port Colborne, JCT
|
Welland
|
11
|
|
|
Parry Sound, JCT
|
Port Sydney, JCT
|
54
|
|
|
Sudbury, JCT
|
Timmins, JCT
|
272
|
|
|
Pembroke
|
Cotnam Island, JCT
|
7
|