Lewisville is a city in Jefferson County, Idaho, home to about 453 people across 0.6 square miles. Its ZIP code is 83431.
Homes sold for a median of $208 per square foot in the three months ending August 2026, a seller’s market.
Each card is that ZIP code’s whole market, including any part outside Lewisville. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
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| Nearest major airport | Salt Lake City International Airport (SLC)199 miles away |
|---|---|
| Closer regional airport | Idaho Falls Regional Airport (IDA)11 miles away |
| Nearest city of 250,000+ | Denver, CO456 miles away |
| Nearest city of 1 million+ | Phoenix, AZ697 miles away |
Straight-line distances from the center of Lewisville; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Lewisville had 421 residents in the 2020 census, down 10% since 2000.
It’s the 152nd largest of 232 towns in Idaho by population.
Jefferson County grew from 9,441 residents in 1920 to 30,891 in 2020.
Jefferson County, 1920–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 85°F in summer, and winter lows average 15°F. About 13.5 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Rigby, ID weather station (5 miles away).
5,599 jobs at 739 businesses in Jefferson County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
Nearest hospitals
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances.
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Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.