Idaho County, Idaho Demographics 2026

Name: Idaho County, Idaho Demographics
Creator: U.S. Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

Idaho County, Idaho has a population of 17,432, the 20th most populous county in Idaho. The median household income is $66,325 and the median home value is $310,200. The poverty rate is 11.1%.

Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes

Idaho County Quick Facts

Population 17,432

Median Household Income $66,325

Median Home Value $310,200

Poverty Rate 11.1%

Unemployment Rate 3.7%

Median Age 49.4 years

Homeownership Rate 80.9%

Affordability Ratio 4.7x

Bachelor's Degree+ 22.6%

High School Graduation 91.9%

Cities/Places 9

Population 17,432 20th of 44

Median Income $66,325 15% lower than state

Poverty Rate 11.1%

Unemployment 3.7%

How Idaho County Changed

Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.

Metric	2019–2023	2020–2024	Change
Population	17,120	17,432	+1.8%
Median household income	$60,975	$66,325	+8.8%
Median home value	$284,600	$310,200	+9.0%

Median Household Income

Idaho

$66,325

$77,800

National

$80,734

Median Home Value

Idaho

$310,200

$418,600

National

$332,700

Economy & Housing

Household Income Distribution

Under $25K 17.3%

$25K-$50K 19.8%

$50K-$100K 35.9%

$100K+ 27.0%

Detailed income brackets

Under $10K

4.6%

$10K-$15K

3.5%

$15K-$20K

2.9%

$20K-$25K

6.4%

$25K-$30K

3.8%

$30K-$35K

3.5%

$35K-$40K

5.8%

$40K-$45K

4.2%

$45K-$50K

2.7%

$50K-$60K

8.5%

$60K-$75K

9.9%

$75K-$100K

17.5%

$100K-$125K

9.3%

$125K-$150K

8.4%

$150K-$200K

4.7%

$200K+

4.6%

Employment

3.7% Unemployment Rate State: 3.7%|National: 5.2%

48.7% Labor Force Participation

Housing Overview

Owner 80.9%

Renter 19.1%

Affordability Index Moderate

4.7x home value to income ratio

Median gross rent $789/mo 14.3% of median household income annually

People & Demographics

Age Distribution

Under 18

19.8%

18-34

15.4%

35-54

20.2%

55-74

33.0%

75+

11.6%

Race & Ethnicity

Diversity Index

Very Low Diversity

A less diverse community where one racial or ethnic group represents a large majority.

State average: 36 | National average: 61

Education

Educational Attainment (Adults 25+)

Cities & Places in Idaho County

City	Population	Median Income	Poverty	Home Value
Grangeville	3,515	$61,322	16.3%	$293,300
Cottonwood	1,131	$79,271	15.9%	$234,700
Kamiah	1,084	$36,071	17.5%	$222,500
Kooskia	687	$45,938	9.6%	$189,300
Riggins	263	$31,471	18.3%	$352,300
Elk City	202	$61,103	15.8%	$354,200
Stites	165	$28,438	32.1%	$145,000
Ferdinand	162	$72,500	4.4%	$208,900
White Bird	57	N/A	71.9%	N/A

Explore Idaho Rankings

Cities by Population All cities ranked by size Richest Cities Ranked by median income Most Educated By bachelor's degree rate Most Affordable By housing affordability

Population Overview

Idaho County is located in Idaho with a total population of 17,432. It is the 20th most populous county out of 44 in Idaho. The county encompasses 9 Census-designated places.

Age Demographics

The median age in Idaho County is 49.4 years. This is 32% higher than the state median of 37.3 years. 11.6% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The median household income in Idaho County is $66,325. This is 15% lower than the state median of $77,800. It is also 18% lower than the national median of $80,734. The poverty rate stands at 11.1%. This is 5% higher than the state poverty rate of 10.6%. The unemployment rate is 3.7%. This is 1% lower than the state rate of 3.7%. The median home value is $310,200. Housing costs are 26% lower than the state median of $418,600. The home-value-to-income ratio is 4.7x. 80.9% of occupied housing units are owner-occupied. This homeownership rate is 12% higher than the state average of 72.1%.

Race & Ethnicity

Idaho County has a predominantly White (non-Hispanic) population, comprising 89.1% of all residents. Hispanic or Latino residents account for 4.0%. The Black or African American population (0.1%) is well below the state average of 0.7%. The Hispanic or Latino population (4.0%) is well below the state average of 13.7%. The Asian population (0.5%) is well below the state average of 1.3%.

Education

22.6% of residents aged 25 and older hold a bachelor's degree or higher. This is 29% lower than the state rate of 31.8%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 91.9%.

Data Sources & Methodology

All figures for Idaho County come from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates, with comparisons drawn against Idaho and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.

Frequently Asked Questions

What is the population of Idaho County, Idaho?

Idaho County has a population of 17,432, making it the 20th most populous county in Idaho.

What is the median income in Idaho County?

The median household income in Idaho County is $66,325 with a poverty rate of 11.1%.

How many cities are in Idaho County, Idaho?

Idaho County contains 9 Census-designated places.