Where was Deranged (1974) filmed?
1974 film directed by Alan Ormsby
Deranged (1974) was filmed in Oshawa, 1 place named in its Wikipedia article, in Canada. Wikidata records no filming location for it at all, so the article is the only recorded source. Each place says where its claim comes from.
Places per Wikipedia's article
The Wikipedia article names 1 place. Each links to the sentence that says so.
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Towns & cities
Oshawa
Canada
City in Durham Region, Ontario, Canada
“A Canadian film by Karr International Pictures, the production took place in Oshawa, Ontario in the winter of 1973, with a largely Canadian cast and crew.” Wikipedia