Lewis County, Idaho Demographics 2026
Lewis County, Idaho has a population of 3,682, the 41st most populous county in Idaho. The median household income is $51,615 and the median home value is $225,300. The poverty rate is 15.3%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Lewis County Quick Facts
How Lewis 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 | 3,649 | 3,682 | +0.9% |
| Median household income | $49,643 | $51,615 | +4.0% |
| Median home value | $202,400 | $225,300 | +11.3% |
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 Lewis County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Nezperce | 522 | $62,857 | 15.0% | $189,300 |
| Craigmont | 509 | $60,000 | 7.7% | $207,300 |
| Winchester | 302 | $45,208 | 27.2% | $225,000 |
| Reubens | 68 | $76,250 | 8.8% | $125,000 |
Explore Idaho Rankings
Population Overview
Lewis County is located in Idaho with a total population of 3,682. It is the 41st most populous county out of 44 in Idaho. The county encompasses 4 Census-designated places.
Age Demographics
The median age in Lewis County is 49.0 years. This is 31% higher than the state median of 37.3 years. 11.3% 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 Lewis County is $51,615. This is 34% lower than the state median of $77,800. It is also 36% lower than the national median of $80,734. The poverty rate stands at 15.3%. This is 45% higher than the state poverty rate of 10.6%. The unemployment rate is 2.4%. This is 35% lower than the state rate of 3.7%. The median home value is $225,300. Housing costs are 46% lower than the state median of $418,600. The home-value-to-income ratio is 4.4x. 76.4% of occupied housing units are owner-occupied. This homeownership rate is 6% higher than the state average of 72.1%.
Race & Ethnicity
The largest racial or ethnic group in Lewis County is White (non-Hispanic), making up 81.7% of the population. Hispanic or Latino residents account for 4.3%. The Black or African American population is significantly higher than the state average (1.1% vs 0.7%). The Hispanic or Latino population (4.3%) is well below the state average of 13.7%.
Education
21.3% of residents aged 25 and older hold a bachelor's degree or higher. This is 33% 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 91.4%.
Data Sources & Methodology
All figures for Lewis 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 Lewis County, Idaho?
Lewis County has a population of 3,682, making it the 41st most populous county in Idaho.
What is the median income in Lewis County?
The median household income in Lewis County is $51,615 with a poverty rate of 15.3%.
How many cities are in Lewis County, Idaho?
Lewis County contains 4 Census-designated places.