Fallon County, Montana

Fallon County population, land area and income

Fallon County had 2,946 residents in the Census Vintage 2024 estimate, on 1,620.6 square miles of land. It ranks 42nd of 56 in Montana by population and 45th by land area. That works out to 1.8 people per square mile, below the US average of 96.3, and in the bottom quarter nationally.

The median county-equivalent in Montana has 7,814 residents, so Fallon County has 38% of the typical county's population.

Its SAIPE 2023 median household income of $66,776 is above the national county median among 3,143 counties with an estimate.

How Fallon County's population changed since 2020

Fallon County lost 83 residents between the July 2020 and July 2024 estimates, a drop of 2.7%. That ranks 54th of 56 in Montana for growth. The median Montana county changed by +2.8%, and the state as a whole by +4.6%.

Since the April 2020 estimates base, Fallon County recorded 144 births and 132 deaths, a natural change of +12. Net international migration added +0 and net domestic migration, people moving to or from other US counties, came to -109. The largest single component was domestic migration, which removed 109 people.

Where Fallon County is

The Census internal point of Fallon County is at 46.318200, -104.405700. It sits in UTM zone 13N. The map shades Montana's 56 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Fallon County outlined. Dots are towns of 1,000+ people with residents in it.

Towns in Fallon County

One incorporated place of 1,000+ people has residents in Fallon County, 1,767 people together, or 60% of the county. Each figure counts only the part of the town inside Fallon County; towns marked "part" extend into another county. The largest is Baker with 1,767.

Counties bordering Fallon County

The Census 2024 county adjacency file lists 8 neighbors for Fallon County, including 4 across a state line. The most populous is Custer County, MT, with 11,964 residents. Distances run between Census internal points in a straight line.

• Custer County

  11,964 people

  55 mi W

• ND

  Bowman County, ND

  2,886 people

  45 mi ESE

• ND

  Golden Valley County, ND

  1,795 people

  50 mi NNE

• Carter County

  1,399 people

  56 mi S

• SD

  Harding County, SD

  1,325 people

  67 mi SE

• Prairie County

  1,112 people

  62 mi WNW

• Wibaux County

  911 people

  45 mi N

• ND

  Slope County, ND

  660 people

  46 mi ENE

Distance to Helena and the nearest big city

Helena is 362.6 miles W of Fallon County's internal point in a straight line. The nearest place of 100,000 or more is Billings, MT (population 121,483), 202.1 miles away. The nearest place of 10,000 or more is Dickinson, ND (population 25,695), 86.1 miles away.

Fallon County FIPS code

The FIPS code of Fallon County is 30025: state code 30 for Montana plus county code 025. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $66,776.