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Duncan, IA
Full City Profile · Iowa · Hancock County County
2.4
/5.0
C
Fair
41
Population
52/sq mi density
46°F
Avg Temperature
260 sunny days/yr
302
Violent Crime/100K
1,260 property/100K
C
Overall
2.4 / 5.0
Fair overall score based on economy, affordability, safety and education
F
Safety
1.0 / 5.0
302 violent crimes/100K
B+
Education
3.8 / 5.0
0.0% bachelor's degree or higher
Change Over Time (2013–2023)
Population Change
-72.3%
148 → 41
over 10 years
Annual Pop. Growth
-12.05%
Compound annual growth rate
Population Over Time
Total population for Duncan across each available Census ACS release.
Median Household Income Over Time
Median household income reported by U.S. Census ACS. Values are nominal (not adjusted for inflation).
Projected 2030
Simple projections extrapolating the 2013–2023 compound annual growth rate forward. These are mathematical extensions of recent trends, not forecasts — real outcomes depend on migration, policy and economic shifts.
Projected Population 2030
17
-24 from 2023 (41)
Year-by-Year Detail
| Year | Population | YoY % | Median Income | YoY % |
|---|---|---|---|---|
| 2013 | 148 | — | $14,750 | — |
| 2015 | 95 | -35.8% | — | — |
| 2017 | 94 | -1.1% | $77,500 | — |
| 2019 | 119 | +26.6% | — | — |
| 2021 | 100 | -16% | — | — |
| 2023 | 41 | -59% | — | — |
Source: U.S. Census ACS 5-Year Estimates (Data Commons). Home value and rent are not yet available historically.