ZIP Code 59638
About Jefferson City
Jefferson City is an unincorporated community and census-designated place (CDP) in Jefferson County, Montana, United States. As of the 2020 census, Jefferson City had a population of 597. It is part of the Helena Micropolitan Statistical Area.
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Area Profile
US Census (ACS 5-year · Gazetteer)
511
population
$73,375
median household income
8
people / sq mi
$269,000
median home value
52.7
median age
212
housing units
212
households
60.4
land area (sq mi)