Clark County, Idaho Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Clark County, ID Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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N/A
Health Not enough data
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D
Income Well below averageAmong the 3 least wealthy counties in Idaho
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F
Education Well below averageLeast educated county in Idaho
Source: Map AI Methodology
Population: density and quick facts
| Metric | Clark County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Population | 848 | 1,929,983 | 337,468,954 |
| Population density (per sq mi) | 0.5 | 23.1 | 86.4 |
| Population growth (%/yr) | -1.17% | 2.12% | 0.59% |
| Median age | 33.4 | 38.7 | 37.3 |
| Households | 279 | 712,816 | 130,235,071 |
Population in Clark County declined by 13.7% from 2009 to 2024, reaching 848 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Clark County is Gen Z, aged 13–28, at 21.7% of residents. That is 1.1 points below Idaho as a whole.
- Gen Z 13–28 184 21.7% -1.1 pts
- Millennials 29–44 146 17.2% -3.5 pts
- Gen X 45–60 174 20.5% +1.3 pts
- Boomers 61–79 137 16.1% +0.1 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Idaho, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 47.6% of the people living in Clark County and men 52.4%.
- Women 47.6% Idaho 49.6%
- Men 52.4% Idaho 50.4%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in Clark County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
Clark County has a the economy index of D, which means it is barely prosperous.
| Metric | Clark County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Median household income | $56,333 | $78,141 | $80,455 |
| Income growth (%/yr) | 8.31% | 5.97% | 4.80% |
| Unemployment rate | 2.1% | 3.7% | 5.2% |
The median household income in Clark County is about 28% lower than in Idaho.
Housing
| Metric | Clark County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Median home price | $182,812 | $394,140 | $248,835 |
| Median rent | $772 | $1,236 | $1,407 |
| Homeownership rate | 61.3% | 72.3% | 65.2% |
The median home price in Clark County is about 19.7 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $772 per month for that long.
Commute Time & Mobility
Commuters in Clark County spend about 45 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 186 hours, about 7.8 full days, spent commuting.
| Metric | Clark County | Idaho Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 22.3 | 18.0 | 22.4 |
| Round-trip commute (min) | 44.7 | 35.9 | 44.8 |
| Yearly time spent (hours) | 186 | 150 | 187 |
| Estimated yearly cost | $5,768 | $4,641 | $5,790 |
| Work from home | 9.4% | 13.3% | 15.0% |
| Highway traffic (vehicles/day) | 1,090 | 4,714 | 8,813 |
| Local road traffic (vehicles/day) | 79 | 865 | 1,355 |
Fastest commutes among counties in
Idaho:
Custer County (8.9 min), Lemhi County (11.6 min), Madison County (12.0 min).
Slowest:
Camas County (49.5 min), Boise County (38.0 min), Lincoln County (32.0 min).
The average commute time in Clark County is 22 minutes, longer than the 18 minutes in Idaho.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Clark County has a education index of F, which means it scores poorly in education.
| Metric | Clark County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 17.7% | 27.1% | 31.6% |
| Average household size | 2.93 | 2.64 | 2.53 |
Highest education index among counties in
Idaho:
Latah County (0.4), Teton County (0.3), Ada County (0.3).
Lowest:
Clark County (0.1), Owyhee County (0.2), Lincoln County (0.2).
Health
| Metric | Clark County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | — | 79.5 | 78.3 |
| Self-rated poor health | 21.1% | 15.6% | 16.3% |
| Smokers | 21.0% | 17.6% | 19.0% |
Highest health index among counties in
Idaho:
Madison County (0.8), Latah County (0.8), Ada County (0.8).
Lowest:
Shoshone County (0.8), Washington County (0.8), Lincoln County (0.8).
Clark County, ID Compared With Nearby Counties
How Clark County, ID compares with the 2 counties closest to it.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Clark County, ID | 848 | $56,333 #3/3 | $182,812 #2/3 | 22.3 min #3/3 |
| Jefferson County, ID | 33,153 | $86,175 | $169,582 | 22.1 min |
| Madison County, ID | 54,618 | $60,340 | $295,731 | 12.0 min |
Frequently Asked Questions
Common questions about Clark County, Idaho.
How many people live in Clark County, Idaho?
About 848 people live in Clark County, Idaho, in 279 households of 2.9 people on average. The median age is 33.4, so residents are younger than the U.S. median of 37.3 by about 4 years.
Is Clark County, Idaho mostly urban or rural?
Averaged over its land area, Clark County, Idaho has 0 people per square mile, a density typical of rural areas. That is about 1% of the U.S. average of 86.
How affordable is housing in Clark County, Idaho?
The median home costs 3.2 times the median household income ($182,812 against $56,333), compared with 3.1 times nationally. A ratio of about 3 is traditionally considered affordable. Median rent of $772 a month takes about 16% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
How strong is the job market in Clark County, Idaho?
Unemployment in Clark County, Idaho is only 2.1%, well below the U.S. rate of 5.2%, a sign of a tight labor market where employers compete for workers.
How common is a college degree in Clark County, Idaho?
17.7% of adults in Clark County, Idaho hold a bachelor's degree or higher (about 1 in 6), well below the U.S. share of 31.6%.
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