In 1960, Lewisville became the corporate headquarters of Idahoan Foods, a producer of dehydrated potato products such as instant mashed potatoes, potato casserole, and hash browns. In 2011, the headquarters was moved to Idaho Falls, 14 mi (23 km) south, though it still maintains its main plant in Lewisville.
For the city's important role in Idaho's potato industry, Governor Butch Otter proclaimed August 11, 2007 "Lewisville Day" statewide.
Founding dates: Wikidata, Wikipedia, the U.S. post office records of Blevins & Helbock (CC0) and the Census. Homes by year built: Census ACS 2020–24. National Register of Historic Places: National Park Service (list of May 22, 2026). Old photos, postcards and papers: Wikimedia Commons, the Library of Congress and other public archives, credited on each item’s page. Maps: U.S. Geological Survey historical topographic maps (via Esri) and Sanborn fire-insurance maps (Library of Congress). History text and census tables: Wikipedia (CC BY-SA 4.0). Places that used to be: USGS Geographic Names Information System (2021). How TownRatings grades history →
From Wikimedia Commons (1), Wikipedia, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia), the US Post Offices dataset (Blevins & Helbock) and the USGS Geographic Names Information System. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.