Spencer, Idaho Demographics & Population 2026
During the 2020–2024 ACS period, Spencer, Idaho had a total population of 19, the 229th largest city in Idaho, with a median household income of $74,219, which is 5% lower than the state average. The poverty rate is 5.3%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Only 0.0% of adults have a bachelor's degree, well below the national average of 35.7%.
Spencer Quick Facts
How Spencer 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 | 28 | 19 | -32.1% |
| Median household income | $70,972 | $74,219 | +4.6% |
How Spencer 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
Moderate diversity with one or two groups making up the majority.
State average: 36 | National average: 61
Education
Educational Attainment (Adults 25+)
Spencer Rankings in Idaho
Explore Idaho Rankings
Other Cities in Clark County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Dubois | 585 | $48,611 | 14.0% | $209,600 |
Cities Similar to Spencer
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Yellow Pine | 17 | N/A | N/A | 0.0% | 0.0% |
| Coolin | 24 | N/A | N/A | 0.0% | 0.0% |
| Princeton | 25 | N/A | N/A | 0.0% | 0.0% |
| Viola | 30 | N/A | N/A | 66.7% | 0.0% |
| Placerville | 30 | $63,125 | $412,500 | 3.3% | 3.3% |
A note before these figures: with a population of 19, Spencer'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
Spencer is a small community located in Idaho, within Clark County. The total population is 19. It ranks as the 229th most populous out of 232 Census-designated places in Idaho.
Age Demographics
The median age in Spencer is 66.3 years. This is 78% higher than the state median of 37.3 years.
Economy, Income & Housing
The median household income in Spencer is $74,219. This is 5% lower than the state median of $77,800. It is also 8% lower than the national median of $80,734. The poverty rate stands at 5.3%. This is 50% lower than the state poverty rate of 10.6%. The survey records no unemployed residents in Spencer, which reflects the size of the sample rather than a labor market without joblessness. 92.3% of occupied housing units are owner-occupied. This homeownership rate is 28% higher than the state average of 72.1%.
Race & Ethnicity
The largest racial or ethnic group in Spencer is White (non-Hispanic), making up 52.6% of the population. Hispanic or Latino residents account for 42.1%. The Hispanic or Latino population is significantly higher than the state average (42.1% vs 13.7%).
Education
0.0% of residents aged 25 and older hold a bachelor's degree or higher. This is among the lowest rates in the state, which may correlate with employment and income patterns. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 94.4%.
Data Sources & Methodology
All demographic data for Spencer, 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.
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Frequently Asked Questions
What is the population of Spencer, Idaho?
Spencer, Idaho has a population of 19 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Spencer, ID?
The median household income in Spencer is $74,219, which is 8% lower than the national median of $80,734.
What is the poverty rate in Spencer, ID?
The poverty rate in Spencer is 5.3%. This means approximately 1 residents live below the federal poverty line.
What is the racial makeup of Spencer, Idaho?
Spencer's population is 52.6% White, 0.0% Black, 42.1% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Spencer, ID?
The Census Bureau does not publish a reliable median home value estimate for Spencer — there are too few owner-occupied homes in the ACS sample. The national median is $332,700.
How educated is Spencer, Idaho?
0.0% of adults (25+) in Spencer hold a bachelor's degree or higher, and 0.0% hold a graduate or professional degree.