Population 120 · Census ACS 2020–24
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Median age by neighborhoodHistory and comparison ↓︎
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Population and households in Duncan
Household size in Duncan
| Period | Duncan | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 2.27 | 2.44 | 2.68 |
| 2010–14 | 2.32 | 2.45 | 2.73 |
| 2015–19 | 2.22 | 2.43 | 2.71 |
| 2020–24 | 2.37 | 2.43 | 2.65 |
| Change | +0.11 | −0.01 | −0.03 |
Households in Duncan are small: just 2.37 people on average, compared with 2.65 nationally. That is typical of places where many people live alone or as couples, and fewer have children at home. Household size has climbed from 2.27 in 2006–10, but in a place this small, survey estimates can swing a lot from one release to the next.
Household size: the average number of people living in each occupied home. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25010).
Median age in Duncan
| Period | Duncan | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 47.2 | 38.8 | 37.7 |
| 2010–14 | 47.3 | 39.3 | 38.6 |
| 2015–19 | 47.7 | 39.7 | 39.6 |
| 2020–24 | 44.6 | 39.8 | 40.1 |
| Change | −2.6 | +1.0 | +2.3 |
Duncan skews older: half of its residents are older than 44.6, well above the national median of 40.1. That usually means more empty nesters and retirees, and fewer young families.
Median age: the age that splits residents into two equal halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B01002).
Single-parent households in Duncan
| Period | Duncan | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 4.3% | 9.5% | 12.3% |
| 2010–14 | 2.2% | 9.9% | 12.3% |
| 2015–19 | 4.3% | 10.0% | 11.6% |
| 2020–24 | 7.9% | 10.0% | 11.6% |
| Change | +3.6 pts | +0.6 pts | −0.6 pts |
Single-parent households are relatively rare in Duncan: 7.9% of households, against 11.6% nationally.
Single-parent households: households where one adult with no spouse present lives with children under 18. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B11003).
Housing in Duncan
Renters in Duncan
| Period | Duncan | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 12.2% | 26.8% | 33.3% |
| 2010–14 | 19.6% | 28.2% | 35.6% |
| 2015–19 | 20.5% | 28.9% | 36.0% |
| 2020–24 | 12.8% | 28.3% | 34.8% |
| Change | +0.6 pts | +1.5 pts | +1.5 pts |
Duncan is overwhelmingly a place of homeowners: only 12.8% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. Among homeowners, 52.5% have no mortgage at all, well above the national share of 39.8%.
Renters: occupied homes that are rented rather than owned. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25003).
Vacant homes in Duncan
| Period | Duncan | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 7.8% | 8.7% | 11.4% |
| 2010–14 | 11.6% | 8.6% | 11.4% |
| 2015–19 | 11.9% | 9.4% | 11.1% |
| 2020–24 | 11.1% | 8.8% | 9.6% |
| Change | +3.2 pts | +0.1 pts | −1.8 pts |
About as many homes sit empty in Duncan as nationally: 11.1%, against 9.6%. The rate is higher than in Iowa as a whole (8.8%).
Vacant homes: homes with no one living in them, including vacation homes and homes for sale or rent. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25002).
Age of homes in Duncan
| Period | Duncan | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 1970 | 1965 | 1974 |
| 2010–14 | 1972 | 1967 | 1975 |
| 2015–19 | 1968 | 1969 | 1977 |
| 2020–24 | 1967 | 1971 | 1980 |
| Change | −3 | +6 | +6 |
Duncan is a place of older homes: half were built before 1967, while the national median is 1980. That means established neighborhoods, and more houses that may need updating.
Age of homes: the year that splits the housing stock into older and newer halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25035).
Rent in Duncan
| Period | Duncan | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | $662 | $669 | $965 |
| 2010–14 | $595 | $732 | $1,040 |
| 2015–19 | $692 | $821 | $1,213 |
| 2020–24 | $700 | $1,020 | $1,571 |
| Change | +$38 | +$351 | +$606 |
Rent in Duncan runs $700 a month at the median, utilities included, well below the U.S. median of $1,571. Rent takes 22.9% of the typical renter's income, comfortably under the 30% mark often used to define affordable rent.
Rent: monthly rent plus the utilities renters pay themselves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25064).
Education in Duncan
Bachelor's degrees in Duncan
| Period | Duncan | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 12.6% | 26.5% | 28.4% |
| 2010–14 | 16.4% | 27.9% | 29.6% |
| 2015–19 | 25.7% | 29.3% | 32.1% |
| 2020–24 | 15.8% | 32.3% | 35.6% |
| Change | +3.1 pts | +5.8 pts | +7.2 pts |
Fewer adults in Duncan have a four-year degree than in the country as a whole: 15.8%, against 35.6% nationally.
Bachelor's degrees: adults 25 and older with a bachelor's degree or higher. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
High school graduates in Duncan
| Period | Duncan | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 87.8% | 90.4% | 84.9% |
| 2010–14 | 89.3% | 91.4% | 86.1% |
| 2015–19 | 92.5% | 92.1% | 87.7% |
| 2020–24 | 92.0% | 93.0% | 89.3% |
| Change | +4.2 pts | +2.7 pts | +4.3 pts |
About nine in ten adults in Duncan have finished high school (92.0%), a bit above the national rate of 89.3%. That is in line with the rest of Iowa.
High school graduates: adults 25 and older with a high school diploma, GED or more. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
Jobs in Duncan
| Period | Duncan | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 7.5% | 5.2% | 8.1% |
| 2010–14 | 2.4% | 5.4% | 9.4% |
| 2015–19 | 4.5% | 3.7% | 5.6% |
| 2020–24 | 0.2% | 3.7% | 5.4% |
| Change | −7.3 pts | −1.5 pts | −2.7 pts |
Unemployment in Duncan has been low: just 0.2% of the labor force was out of work and looking, well below the national rate of 5.4%. Each figure pools five years of surveys (2020–24), so it describes that whole stretch rather than today's job market.
Unemployment: people looking for work as a share of everyone working or looking. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B23025).
Duncan compared with nearby cities
| City | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| Duncan | 2.37 | 44.6 | 7.9% | 12.8% | 11.1% | 1967 | $700 | 15.8% | 92.0% | 0.2% |
| Britt | 2.12 | 48.3 | 7.5% | 20.0% | 10.1% | 1957 | $776 | 24.7% | 91.3% | 2.2% |
| Hayfield | 2.34 | 44.1 | 9.4% | 14.1% | 12.4% | 1973 | $685 | 17.7% | 92.5% | 0.0% |
| Garner | 2.18 | 48.5 | 10.5% | 18.3% | 4.4% | 1969 | $817 | 20.8% | 90.6% | 2.0% |
| Hutchins | 2.57 | 37.6 | 11.9% | 19.2% | 13.5% | 1941 | $900 | 19.5% | 93.0% | 2.6% |
| Crystal Lake | 2.06 | 46.1 | 2.0% | 10.6% | 10.1% | 1964 | $867 | 18.1% | 93.1% | 0.3% |
| Miller | 2.15 | 51.9 | 8.5% | 11.4% | 6.4% | 1971 | $1,121 | 23.1% | 89.7% | 2.3% |
| Klemme | 2.63 | 43.8 | 7.7% | 12.3% | 8.9% | 1947 | $666 | 11.4% | 90.6% | 0.5% |
| Stilson | 2.63 | 36.4 | 12.8% | 20.2% | 13.9% | 1938 | $904 | 19.5% | 93.1% | 2.8% |
| Forest City | 2.25 | 36.0 | 10.7% | 34.2% | 8.7% | 1966 | $728 | 27.9% | 95.0% | 2.6% |
| Woden | 2.48 | 36.9 | 11.7% | 22.3% | 13.1% | 1941 | $841 | 22.0% | 94.4% | 2.2% |
All figures 2020–24.
Cities with similar populations: Gilmore, AR · Harveysburg, IN · Tripoli, NY · Harrisburg, GA · Harborton, VA · Goldsboro, TX · Wallins Corner, NY · Warner, OH · Glenloch, GA · Glencoe, PA
About these numbers
Every figure on this page is a BestNeighborhood calculation from the Census Bureau's American Community Survey (ACS), built up from the Census block groups that make up Duncan. Each ACS 5-year release pools five years of responses; this page shows the last 15 releases, 2006–10 through 2020–24. Neighboring releases share four of their five years, so they move gradually and small changes between them are within the survey's margin of error; in small places the lines can jump from one release to the next for the same reason. The maps show the same measures for each neighborhood, ranked against the whole country.
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