Streets & squares
Main Street Unionville
Canadian street
1 film or series was filmed at Main Street Unionville. Wikipedia names 2 more.

Movies filmed at Main Street Unionville
A Simple FavorThriller film2018
Filmed here, per Wikipedia
Wikipedia says these were filmed in Main Street Unionville too. Each title’s page links to the sentence that says so.
In the Mouth of MadnessHorror film1994- Schitt’s CreekComedy series2015–
Named here by Main Street Unionville’s own Wikipedia article
Main Street Unionville’s own Wikipedia page says these were shot here. Not on the map: each title’s page quotes the sentence so you can check it.
- Gilmore GirlsComedy series2000–2007
In the Mouth of MadnessHorror film1994
Filming locations nearby
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Towns & cities Unionville
Canada · under 1 km
Neighbourhood of Markham, Ontario
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Landmarks & buildings
Frederick Horsman Varley Art Gallery
Canada · under 1 km
Art museum in Ontario, Canada
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Towns & cities
Markham
Canada · 5 km east
City in the Greater Toronto Area, Ontario, Canada
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Landmarks & buildings
Cathedral of the Transfiguration
Canada · 6 km north-west
Former Slovak Greek Catholic cathedral
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Landmarks & buildings
Seneca Polytechnic
Canada · 9 km south
Public college in Toronto, Ontario, Canada
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Landmarks & buildings
Markham Airport
Canada · 9 km north-east
Airport in Ontario, Canada
What Wikipedia says about Main Street Unionville
2 sentences quoted word for word from Wikipedia, each with the production it describes and a link to the article it comes from.
Gilmore Girls 2000–2007
“The street was also used as a stand-in for fictional Connecticut town Stars Hollow during the first season of The WB's Gilmore Girls television show.” Wikipedia
“The 1994 John Carpenter film, In the Mouth of Madness prominently features the northernmost part of the street as a stand-in for a fictional New England town, especially the exterior of the Unionville Arms Pub.” Wikipedia