Where was Napoleon Dynamite filmed?
2004 film by Jared Hess
Napoleon Dynamite (2004) was filmed in Franklin County, Preston and Preston High School, 3 places named in its Wikipedia article, in the United States. Wikidata itself records the shoot only as Idaho. Each place says where its claim comes from.
Places per Wikipedia's article
The Wikipedia article names 3 places. Each links to the sentence that says so.
Recorded only at country level
Also filmed in Idaho, but the exact places are not known, so they are not on the map.
Filming locations that are mapped there: United States