Fremont County, Idaho Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 23rd-largest in Idaho
The population of Fremont County, Idaho is 13,701 as of the 2023 American Community Survey, making it the 23rd-largest county in Idaho. The median household income is $72,767, the median home value is $281,800, and the median age is 39.9.
The population of Fremont County has grown 8.8% since 2010 (13,232 → 14,399), a +0.61% annualized rate.
13,701
Population
+0.61%
Annual growth
7
People / sq mi
$72,767
Median Income
$281,800
Median Home Value
Fremont County covers 1,864 sq mi of land at 7.4 people per square mile.
About Fremont County, ID
Fremont County is a county in Idaho with a population of 13,701. It ranks #23 among counties in Idaho by population. The median age is 39.9, in line with the national median. The population is 51.8% male and 48.2% female.
The median household income in Fremont County is $72,767, near the US median of $74,580. 6.7% of residents live below the federal poverty level. Home values sit at a median of $281,800, with monthly rent averaging $803. The homeownership rate of 84.2% is higher than the national rate of 64.8%.
Educational attainment in Fremont County reflects 21.8% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 13.3% of workers primarily work from home, similar to the national work-from-home rate of 14.2%. The average commute is 25.1 minutes each way.
Fremont County Population History (2010-2024)
The county of Fremont County had a population of 13,232 in 2010 and 14,399 in 2024, a 8.8% growth over 14 years. The peak was 14,399 in 2024. Average annual growth rate: 0.61%.
14,399
Population (2024)
13,232
Population (2010)
14,399
Peak (2024)
0.61%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 13,232 |
| 2011 | 13,116 |
| 2012 | 12,973 |
| 2013 | 12,881 |
| 2014 | 12,815 |
| 2015 | 12,824 |
| 2016 | 12,932 |
| 2017 | 13,140 |
| 2018 | 13,162 |
| 2019 | 13,105 |
| 2020 | 13,419 |
| 2021 | 13,593 |
| 2022 | 14,048 |
| 2023 | 14,258 |
| 2024 | 14,399 |
Race & Ethnicity
| White | 88.8% |
| Black or African American | 0.3% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.6% |
| Two or More Races | 0.0% |
Age & Sex
39.9
Median Age
48.2%
Female
51.8%
Male
17.8%
Age 65+
Age Distribution
Children (under 15): 19.3% · Seniors (65+): 17.8%
Income & Poverty
| Median household income | $72,767$-1,869 vs state |
| Mean household income | $90,888 |
| Per-capita income | $32,085 |
| Poverty rate | 6.7%-0.3% vs state |
| Unemployment rate | 2.7% |
| Employment-to-population | 54.9% |
Top Industries by Employment
The largest employment sector in Fremont County is professional & business services, accounting for 18.9% of workers.
How residents commute
0.2%
Drive alone
2.5%
Carpool
72.5%
Public transit
13.3%
Work from home
25.1 min
Avg commute
Housing
$281,800$-94,200 vs state
Median home value
$803
Median rent
84.2%
Homeownership rate
8,669
Total housing units
52.0%
Occupied
48.0%
Vacant
15.8%
Renter-occupied
Social & access
87.8%
With health insurance
97.1%
With broadband internet
35.8%
Foreign-born
6.5%
Veterans (18+)
17.9%
With a disability
89.5%
Speak language other than English at home
Education
90.7%
High School+
21.8%
Bachelor's+
Largest cities in Idaho
Other counties in Idaho
Part of Idaho
Metro areas in Idaho
County rankings
Frequently Asked Questions
Fremont County, Idaho has a population of 13,701 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 23rd-largest county in Idaho. Population density is 7 people per square mile.
The population of Fremont County has grown 8.8% since 2010 (13,232 → 14,399), a +0.61% annualized rate.
The median household income in Fremont County, Idaho is $72,767, with mean (average) household income of $90,888 and per-capita income of $32,085. 6.7% of residents live below the federal poverty level.
In Fremont County, the largest racial and ethnic groups are White (88.8%), Hispanic or Latino (2.6%), Black or African American (0.3%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Fremont County, Idaho is 39.9 years. Residents are 48.2% female and 51.8% male.
The median home value in Fremont County is $281,800 and median monthly rent is $803. 84.2% of occupied housing units are owner-occupied. The county has 8,669 total housing units, 48.0% of which are vacant.
The largest employment sector in Fremont County, Idaho is professional, scientific, and management services, employing 18.9% of workers. The unemployment rate is 2.7%.
Boise City is among the largest cities associated with Fremont County, Idaho, with a population of 235,701.
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Statewide data for Idaho
Population, race, income, age, and trends across Idaho
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.