List of controlled-access highways in Ontario
The province of Ontario does not have a single unified network of controlled-access highways or freeways. Although most freeways are part of the 400-series highways, which can be characterized by their high design standard, several other sections of provincial highways are also classified as freeways. Additionally, several controlled-access highways, called municipal expressways, are maintained by municipalities rather than the provincial government like provincial highways are.
Freeways
The following is a list of freeways in Ontario as defined by the Official Road Map of Ontario published by the Ministry of Transportation of Ontario. The MTO defines a freeway as a divided highway with at least two lanes in each direction.400-series highways
All 400-series highways are freeways for their entire length.- /
Other provincial highways
Some non 400-series highways are also freeways for some of all of their length.| Number | From | To | Note | Ref |
| Colonel Talbot Rd | Wonderland Rd S | Concurrency with. | ||
| Concurrency with. | ||||
| Concurrency with. | ||||
| Victoria St N | Sections known as the Conestoga Parkway. | |||
| Lansdowne St E | Concurrency with. | |||
| Sections known as the Conestoga Parkway. | ||||
| Concurrency with. | ||||
| Part of the Conestoga Parkway. | ||||
| Lansdowne St E | Entire length. | |||