Jefferson City is a community in Jefferson County, Montana, home to about 533 people across 23 square miles. Its ZIP code is 59638.
Homes sold for a median of $211 per square foot in the three months ending August 2026, a buyer’s market.
Mostly Jefferson City; also Clancy
Each card is that ZIP code’s whole market, including any part outside Jefferson City. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
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| Nearest major airport | Spokane International Airport (GEG)274 miles away |
|---|---|
| Closer regional airport | Helena Regional Airport (HLN)17 miles away |
| Nearest city of 250,000+ | Seattle, WA494 miles away |
Straight-line distances from the center of Jefferson City; 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.
Jefferson City had 597 residents in the 2020 census, up 102% since 2000.
It’s the 150th largest of 475 towns in Montana by population.
Jefferson County grew from 5,330 residents in 1900 to 12,085 in 2020.
Jefferson County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 82°F in summer, and winter lows average 10°F. About 17.7 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Tizer Gardens, MT weather station (about a mile away).
1,959 jobs at 342 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.
Parks (1 nearby)
Museums
Counts are within about 3.5 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
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Shares ZIP codes with Clancy.
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.