Clark County, Idaho Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 44th-largest in Idaho
The population of Clark County, Idaho is 776 as of the 2023 American Community Survey, making it the 44th-largest county in Idaho. The median household income is $52,083, the median home value is $203,000, and the median age is 33.4.
The population of Clark County has declined 19.1% since 2010 (981 → 794), a -1.50% annualized rate.
776
Population
-1.50%
Annual growth
0
People / sq mi
$52,083
Median Income
$203,000
Median Home Value
Clark County covers 1,763 sq mi of land at 0.4 people per square mile.
About Clark County, ID
Clark County stands apart on settlement density — it is among the most sparsely settled of US counties, at roughly 0 people per square mile. Clark County is a county in Idaho with a population of 776. It ranks #44 among counties in Idaho by population.
Earnings trail the nation, with the median household making $52,083, below the US median of $78,538. About 9.1% of residents live below the federal poverty level, below the national 12.4%. Homes carry a median value of $203,000, with typical rent around $771.
College attainment is 17.3%, below the national 35.0%. Remote work is below the national 14.0% at 9.6%, and the average commute runs about 27 minutes each way.
Clark County Population History (2010-2024)
The county of Clark County had a population of 981 in 2010 and 794 in 2024, a -19.1% growth over 14 years. The peak was 981 in 2010. Average annual growth rate: -1.47%.
794
Population (2024)
981
Population (2010)
981
Peak (2010)
-1.47%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 981 |
| 2011 | 955 |
| 2012 | 885 |
| 2013 | 879 |
| 2014 | 889 |
| 2015 | 885 |
| 2016 | 867 |
| 2017 | 878 |
| 2018 | 845 |
| 2019 | 838 |
| 2020 | 793 |
| 2021 | 794 |
| 2022 | 812 |
| 2023 | 801 |
| 2024 | 794 |
Race & Ethnicity
| White | 67.1% |
| Black or African American | 0.0% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.5% |
| Two or More Races | 0.0% |
Age & Sex
33.4
Median Age
46.8%
Female
53.2%
Male
13.1%
Age 65+
Age Distribution
Children (under 15): 24.6% · Seniors (65+): 13.1%
Income & Poverty
| Median household income | $52,083$-22,553 vs state |
| Mean household income | $58,492 |
| Per-capita income | $22,917 |
| Poverty rate | 9.1%+2.1% vs state |
| Unemployment rate | 1.2% |
| Employment-to-population | 62.0% |
Top Industries by Employment
The largest employment sector in Clark County is agriculture, accounting for 27.3% of workers.
How residents commute
0.0%
Drive alone
2.5%
Carpool
55.3%
Public transit
9.6%
Work from home
26.7 min
Avg commute
Housing
$203,000$-173,000 vs state
Median home value
$771
Median rent
63.9%
Homeownership rate
442
Total housing units
57.0%
Occupied
43.0%
Vacant
36.1%
Renter-occupied
Social & access
82.6%
With health insurance
89.7%
With broadband internet
24.0%
Foreign-born
1.8%
Veterans (18+)
15.2%
With a disability
71.3%
Speak language other than English at home
Education
75.7%
High School+
17.3%
Bachelor's+
Largest cities in Idaho
Other counties in Idaho
Part of Idaho
Metro areas in Idaho
County rankings
Frequently Asked Questions
Clark County, Idaho has a population of 776 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 44th-largest county in Idaho. Population density is 0 people per square mile.
The population of Clark County has declined 19.1% since 2010 (981 → 794), a -1.50% annualized rate.
The median household income in Clark County, Idaho is $52,083, with mean (average) household income of $58,492 and per-capita income of $22,917. 9.1% of residents live below the federal poverty level.
In Clark County, the largest racial and ethnic groups are White (67.1%), Hispanic or Latino (0.5%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Clark County, Idaho is 33.4 years. Residents are 46.8% female and 53.2% male.
The median home value in Clark County is $203,000 and median monthly rent is $771. 63.9% of occupied housing units are owner-occupied. The county has 442 total housing units, 43.0% of which are vacant.
The largest employment sector in Clark County, Idaho is agriculture, forestry, fishing, and mining, employing 27.3% of workers. The unemployment rate is 1.2%.
Boise City is among the largest cities associated with Clark County, Idaho, with a population of 235,701.
Clark County, ID Climate
Clark County, ID has an average annual temperature of 4.9°C (41°F) and receives about 250 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
4.9°C
Avg Temp
250
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -8° / 18° | 16 mm |
| February | -6° / 22° | 17 mm |
| March | -1° / 30° | 16 mm |
| April | 4° / 39° | 18 mm |
| May | 9° / 49° | 42 mm |
| June | 14° / 57° | 38 mm |
| July | 18° / 64° | 19 mm |
| August | 18° / 64° | 18 mm |
| September | 13° / 55° | 20 mm |
| October | 7° / 44° | 17 mm |
| November | -1° / 30° | 12 mm |
| December | -7° / 19° | 17 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 Clark County, ID
The most comfortable months to visit Clark County, ID are typically July, August and September, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 28°C high). The coldest is January (near -14°C low). May is usually the wettest month.
Where to stay near Clark County
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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.