Fremont County, Idaho

Fremont County population, land area and income

Fremont County had 14,399 residents in the Census Vintage 2024 estimate, on 1,864.0 square miles of land. It ranks 23rd of 44 in Idaho by population and 16th by land area. That works out to 7.7 people per square mile, below the US average of 96.3, and in the bottom quarter nationally.

The median county-equivalent in Idaho has 15,019 residents, about the same as Fremont County.

Its SAIPE 2023 median household income of $72,061 is above the national county median among 3,143 counties with an estimate.

How Fremont County's population changed since 2020

Fremont County gained 980 residents between the July 2020 and July 2024 estimates, a rise of 7.3%. That ranks 22nd of 44 in Idaho for growth. The median Idaho county changed by +7.2%, and the state as a whole by +8.2%.

Since the April 2020 estimates base, Fremont County recorded 797 births and 577 deaths, a natural change of +220. Net international migration added +106 and net domestic migration, people moving to or from other US counties, came to +670. The largest single component was domestic migration, which added 670 people.

Where Fremont County is

The Census internal point of Fremont County is at 44.218100, -111.484400. It sits in UTM zone 12N. The map shades Idaho's 44 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Fremont County outlined. Dots are towns of 1,000+ people with residents in it.

Towns in Fremont County

One incorporated place of 1,000+ people has residents in Fremont County, 4,093 people together, or 28% of the county. Each figure counts only the part of the town inside Fremont County; towns marked "part" extend into another county. The largest is St. Anthony with 4,093.

Counties bordering Fremont County

The Census 2024 county adjacency file lists 8 neighbors for Fremont County, including 4 across a state line. The most populous is Gallatin County, MT, with 126,984 residents. Distances run between Census internal points in a straight line.

• MT

  Gallatin County, MT

  126,984 people

  91 mi N

• Madison County

  55,549 people

  31 mi SSW

• Jefferson County

  34,854 people

  51 mi SW

• WY

  Teton County, WY

  23,272 people

  54 mi ESE

• Teton County

  12,932 people

  34 mi SSE

• MT

  Beaverhead County, MT

  10,006 people

  94 mi NW

• MT

  Madison County, MT

  9,753 people

  79 mi NNW

• Clark County

  794 people

  43 mi W

Distance to Boise and the nearest big city

Boise is 239.0 miles W of Fremont County's internal point in a straight line. The nearest place of 100,000 or more is Billings, MT (population 121,483), 179.7 miles away. The nearest place of 10,000 or more is Rexburg, ID (population 40,695), 31.3 miles away.

Fremont County FIPS code

The FIPS code of Fremont County is 16043: state code 16 for Idaho plus county code 043. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $72,061.