Ontario Highway 3A may refer to:
- the former section of Ontario Highway 3 between Chambers Corners and Niagara Falls
- the former designation of Ontario Highway 3B in Windsor
This disambiguation page lists articles about roads and streets with the same name.
If an internal link led you here, you may wish to change the link to point directly to the intended article.
If an internal link led you here, you may wish to change the link to point directly to the intended article.