Declo, Idaho Demographics & Population 2026
During the 2020–2024 ACS period, Declo, Idaho had a total population of 477, the 149th largest city in Idaho, with a median household income of $46,782, which is 40% lower than the state average. The poverty rate is 14.7%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 40% below the state average, indicating significant economic challenges.
- Near full employment with an unemployment rate of just 0.9%.
Declo Quick Facts
How Declo 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 | 514 | 477 | -7.2% |
| Median household income | $46,780 | $46,782 | +0.0% |
| Median home value | $218,200 | $235,700 | +8.0% |
How Declo 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+)
Declo Rankings in Idaho
Explore Idaho Rankings
Other Cities in Cassia County
Cities Similar to Declo
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Garden Valley | 438 | N/A | $782,100 | 47.9% | 11.2% |
| Grand View | 472 | $58,092 | $173,900 | 5.7% | 20.8% |
| Culdesac | 411 | $49,167 | $160,400 | 12.8% | 32.7% |
| Craigmont | 509 | $60,000 | $207,300 | 19.0% | 7.7% |
| Firth | 429 | $56,250 | $235,400 | 20.6% | 12.1% |
A note before these figures: with a population of 477, Declo'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
Declo is a small community located in Idaho, within Cassia County. The total population is 477. It ranks as the 149th most populous out of 232 Census-designated places in Idaho.
Age Demographics
The median age in Declo is 38.1 years. This is 2% higher than the state median of 37.3 years. With 40.9% of the population under 18, Declo has a notably young demographic profile, suggesting a family-oriented community.
Economy, Income & Housing
The median household income in Declo is $46,782. This is 40% lower than the state median of $77,800. It is also 42% lower than the national median of $80,734. The poverty rate stands at 14.7%. This is 39% higher than the state poverty rate of 10.6%. The unemployment rate is 0.9%. This is 75% lower than the state rate of 3.7%. The median home value is $235,700. Housing costs are 44% lower than the state median of $418,600. The home-value-to-income ratio is 5.0x. 40.2% of occupied housing units are owner-occupied. This homeownership rate is 44% lower than the state average of 72.1%.
Race & Ethnicity
The largest racial or ethnic group in Declo is White (non-Hispanic), making up 70.2% of the population. Hispanic or Latino residents account for 24.1%. The Hispanic or Latino population is significantly higher than the state average (24.1% vs 13.7%).
Education
12.1% of residents aged 25 and older hold a bachelor's degree or higher. This is 62% 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 demographic data for Declo, 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 Declo, Idaho?
Declo, Idaho has a population of 477 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Declo, ID?
The median household income in Declo is $46,782, which is 42% lower than the national median of $80,734.
What is the poverty rate in Declo, ID?
The poverty rate in Declo is 14.7%. This means approximately 70 residents live below the federal poverty line.
What is the racial makeup of Declo, Idaho?
Declo's population is 70.2% White, 0.0% Black, 24.1% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Declo, ID?
The median home value in Declo is $235,700. The home-value-to-income ratio is 5.0x.
How educated is Declo, Idaho?
12.1% of adults (25+) in Declo hold a bachelor's degree or higher, and 4.8% hold a graduate or professional degree.