Nez Perce County, Idaho Demographics 2026
Nez Perce County, Idaho has a population of 42,697, the 10th most populous county in Idaho. The median household income is $72,599 and the median home value is $334,700. The poverty rate is 12.3%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Nez Perce County Quick Facts
How Nez Perce 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 | 42,477 | 42,697 | +0.5% |
| Median household income | $71,466 | $72,599 | +1.6% |
| Median home value | $291,300 | $334,700 | +14.9% |
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
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 Nez Perce County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Lewiston | 34,651 | $72,197 | 12.5% | $333,700 |
| Lapwai | 1,021 | $57,439 | 19.4% | $113,700 |
| Culdesac | 411 | $49,167 | 32.7% | $160,400 |
| Peck | 194 | $58,182 | 30.4% | $152,800 |
| Sweetwater | 163 | $126,875 | 4.3% | $192,300 |
Explore Idaho Rankings
Population Overview
Nez Perce County is located in Idaho with a total population of 42,697. It is the 10th most populous county out of 44 in Idaho. The county encompasses 5 Census-designated places.
Age Demographics
The median age in Nez Perce County is 41.2 years. This is 10% higher than the state median of 37.3 years.
Economy, Income & Housing
The median household income in Nez Perce County is $72,599. This is 7% lower than the state median of $77,800. It is also 10% lower than the national median of $80,734. The poverty rate stands at 12.3%. This is 16% higher than the state poverty rate of 10.6%. The unemployment rate is 2.6%. This is 31% lower than the state rate of 3.7%. The median home value is $334,700. Housing costs are 20% lower than the state median of $418,600. The home-value-to-income ratio is 4.6x. 70.4% of occupied housing units are owner-occupied. This homeownership rate is 2% lower than the state average of 72.1%.
Race & Ethnicity
Nez Perce County has a predominantly White (non-Hispanic) population, comprising 85.5% of all residents. Hispanic or Latino residents account for 4.4%. The Black or African American population (0.2%) is well below the state average of 0.7%. The Hispanic or Latino population (4.4%) is well below the state average of 13.7%.
Education
27.2% of residents aged 25 and older hold a bachelor's degree or higher. This is 15% 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 93.8%.
Data Sources & Methodology
All figures for Nez Perce 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 Nez Perce County, Idaho?
Nez Perce County has a population of 42,697, making it the 10th most populous county in Idaho.
What is the median income in Nez Perce County?
The median household income in Nez Perce County is $72,599 with a poverty rate of 12.3%.
How many cities are in Nez Perce County, Idaho?
Nez Perce County contains 5 Census-designated places.