Cambridge, Idaho Demographics & Population 2026
During the 2020–2024 ACS period, Cambridge, Idaho had a total population of 324, the 170th largest city in Idaho, with a median household income of $50,833, which is 35% lower than the state average. The poverty rate is 13.2%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 35% below the state average, indicating significant economic challenges.
- Near full employment with an unemployment rate of just 2.5%.
Cambridge Quick Facts
How Cambridge 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 | 336 | 324 | -3.6% |
| Median household income | $48,250 | $50,833 | +5.4% |
| Median home value | $234,700 | $289,300 | +23.3% |
How Cambridge Compares
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+)
Cambridge Rankings in Idaho
Explore Idaho Rankings
Other Cities in Washington County
Cities Similar to Cambridge
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Hammett | 319 | N/A | $165,700 | 0.0% | 7.2% |
| Stanley | 319 | N/A | N/A | 77.1% | 21.3% |
| Midvale | 347 | $48,462 | $230,600 | 21.0% | 11.5% |
| Malta | 346 | $55,682 | $159,300 | 18.2% | 57.8% |
| Hollister | 347 | $56,944 | $156,300 | 12.1% | 10.7% |
A note before these figures: with a population of 324, Cambridge's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.
Population Overview
Cambridge is a small community located in Idaho, within Washington County. The total population is 324. It ranks as the 170th most populous out of 232 Census-designated places in Idaho.
Age Demographics
The median age in Cambridge is 56.8 years. This is 52% higher than the state median of 37.3 years. Only 14.8% of residents are under 18, indicating fewer families with children. 19.1% 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 Cambridge is $50,833. This is 35% lower than the state median of $77,800. It is also 37% lower than the national median of $80,734. The poverty rate stands at 13.2%. This is 25% higher than the state poverty rate of 10.6%. The unemployment rate is 2.5%. This is 34% lower than the state rate of 3.7%. The median home value is $289,300. Housing costs are 31% lower than the state median of $418,600. The home-value-to-income ratio is 5.7x. 65.3% of occupied housing units are owner-occupied. This homeownership rate is 9% lower than the state average of 72.1%.
Race & Ethnicity
Cambridge has a predominantly White (non-Hispanic) population, comprising 89.8% of all residents.
Education
22.5% 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 97.8%.
Data Sources & Methodology
All demographic data for Cambridge, Idaho is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Idaho state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 232 Census-designated places in Idaho. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
Free data download: Get all Idaho city and county demographics as CSV. Download Cities CSV | Download Counties CSV
Frequently Asked Questions
What is the population of Cambridge, Idaho?
Cambridge, Idaho has a population of 324 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Cambridge, ID?
The median household income in Cambridge is $50,833, which is 37% lower than the national median of $80,734.
What is the poverty rate in Cambridge, ID?
The poverty rate in Cambridge is 13.2%. This means approximately 40 residents live below the federal poverty line.
What is the racial makeup of Cambridge, Idaho?
Cambridge's population is 89.8% White, 0.0% Black, 0.0% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Cambridge, ID?
The median home value in Cambridge is $289,300. The home-value-to-income ratio is 5.7x.
How educated is Cambridge, Idaho?
22.5% of adults (25+) in Cambridge hold a bachelor's degree or higher, and 13.8% hold a graduate or professional degree.