Where was Steel Magnolias filmed?
1989 film directed by Herbert Ross
Steel Magnolias (1989) was filmed in Natchitoches Parish and Natchitoches, 2 places named in its Wikipedia article, in the United States. 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 2 places. Each links to the sentence that says so.