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
Homeownership is the standout figure in Fremont County: 84.2% of homes are owner-occupied, higher than the national rate. Fremont County is a county in Idaho with a population of 13,701. It ranks #23 among counties in Idaho by population.
Median household income is $72,767, below the US median of $78,538. Poverty is relatively low for US counties at 6.7%, below the national 12.4%. A typical home is worth $281,800, with typical rent around $803.
21.8% of adults 25 and older hold a bachelor’s degree, below the national average of 35.0%. A solid 13.3% of workers are based at home, close to the national 14.0%, and the average commute runs about 25 minutes each way.
The ownership rate anchors the housing story in Fremont County, and tends to move with the age structure and home-value figures above.
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.
Fremont County, ID Climate
Fremont County, ID has an average annual temperature of 3.4°C (38°F) and receives about 614 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
3.4°C
Avg Temp
614
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -8° / 17° | 76 mm |
| February | -6° / 20° | 58 mm |
| March | -3° / 27° | 53 mm |
| April | 2° / 35° | 45 mm |
| May | 7° / 45° | 60 mm |
| June | 12° / 54° | 51 mm |
| July | 16° / 60° | 31 mm |
| August | 16° / 60° | 32 mm |
| September | 11° / 51° | 36 mm |
| October | 5° / 41° | 40 mm |
| November | -3° / 27° | 61 mm |
| December | -8° / 18° | 71 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Fremont County, ID
The most comfortable months to visit Fremont County, ID are typically July, August and June, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 25°C high). The coldest is January (near -14°C low). January is usually the wettest month.
Where to stay near Fremont County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.