Population 54,409 · Census ACS 2020–24
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Population and households in Warren County
Household size in Warren County
| Period | Warren County | Des Moines area | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.58 | 2.51 | 2.44 | 2.68 |
| 2010–14 | 2.59 | 2.56 | 2.45 | 2.73 |
| 2015–19 | 2.53 | 2.55 | 2.43 | 2.71 |
| 2020–24 | 2.56 | 2.52 | 2.43 | 2.65 |
| Change | −0.02 | +0.01 | −0.01 | −0.03 |
Households in Warren County run a little small, averaging 2.56 people against 2.65 nationally, which usually means more singles and couples and fewer children. Households are largest in the west and smallest in the south. Among Iowa's 99 counties, though, only nine have larger households.
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 Warren County
| Period | Warren County | Des Moines area | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 38.5 | 36.2 | 38.8 | 37.7 |
| 2010–14 | 38.5 | 36.7 | 39.3 | 38.6 |
| 2015–19 | 38.2 | 37.2 | 39.7 | 39.6 |
| 2020–24 | 39.2 | 37.6 | 39.8 | 40.1 |
| Change | +0.8 | +1.4 | +1.0 | +2.3 |
At 39.2, the median age in Warren County is close to the national median of 40.1, so its age mix looks much like the country's. The population here is older than in the wider Des Moines area, where the median age is 37.6. Since 2006–10, the median age has crept up from 38.5, as it has nationally.
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 Warren County
| Period | Warren County | Des Moines area | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 8.8% | 10.2% | 9.5% | 12.3% |
| 2010–14 | 10.4% | 11.1% | 9.9% | 12.3% |
| 2015–19 | 9.8% | 10.9% | 10.0% | 11.6% |
| 2020–24 | 11.0% | 11.2% | 10.0% | 11.6% |
| Change | +2.2 pts | +0.9 pts | +0.6 pts | −0.6 pts |
Single-parent households are about as common in Warren County as they are nationally: 11.0%, against 11.6%. Since 2006–10, the single-parent share has risen 2.2 points, even as the national share fell.
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 Warren County
Renters in Warren County
| Period | Warren County | Des Moines area | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 20.9% | 27.3% | 26.8% | 33.3% |
| 2010–14 | 21.9% | 29.3% | 28.2% | 35.6% |
| 2015–19 | 21.0% | 30.3% | 28.9% | 36.0% |
| 2020–24 | 17.7% | 30.5% | 28.3% | 34.8% |
| Change | −3.2 pts | +3.2 pts | +1.5 pts | +1.5 pts |
Warren County is largely a place of homeowners: only 17.7% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. Among homeowners, 34.3% have no mortgage at all, below the national share of 39.8%. The renter share has fallen 3.2 points since 2006–10, even as the national share rose.
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 Warren County
| Period | Warren County | Des Moines area | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 5.6% | 7.7% | 8.7% | 11.4% |
| 2010–14 | 6.0% | 7.2% | 8.6% | 11.4% |
| 2015–19 | 4.5% | 7.2% | 9.4% | 11.1% |
| 2020–24 | 6.0% | 7.0% | 8.8% | 9.6% |
| Change | +0.4 pts | −0.7 pts | +0.1 pts | −1.8 pts |
Vacancy is on the low side in Warren County: 6.0% of homes sit empty, against 9.6% nationally, which points to steady demand for housing. The picture is much the same across the Des Moines area. Few Iowa counties have a lower vacancy rate: only five of 99.
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 Warren County
| Period | Warren County | Des Moines area | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 1976 | 1976 | 1965 | 1974 |
| 2010–14 | 1980 | 1977 | 1967 | 1975 |
| 2015–19 | 1984 | 1979 | 1969 | 1977 |
| 2020–24 | 1986 | 1983 | 1971 | 1980 |
| Change | +10 | +7 | +6 | +6 |
Homes in Warren County are newer than the national norm: the median home was built in 1986, versus 1980 across the U.S. The median year built has moved up from 1976 in 2006–10, a sign of steady new building. Newer construction is concentrated in the northwest, while the southeast has the oldest housing. Only two of Iowa's 99 counties have newer homes.
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 Warren County
| Period | Warren County | Des Moines area | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | $814 | $808 | $669 | $965 |
| 2010–14 | $913 | $899 | $732 | $1,040 |
| 2015–19 | $894 | $986 | $821 | $1,213 |
| 2020–24 | $1,078 | $1,210 | $1,020 | $1,571 |
| Change | +$264 | +$402 | +$351 | +$606 |
A typical rental in Warren County costs $1,078 a month with utilities, well below the national median of $1,571. Rents are up $264 a month from 2006–10, a 32% rise, a slower climb than the nation's. The typical renter here spends 27.8% of household income on rent, just under the 30% mark often used to define affordable rent, and a smaller share than renters pay nationally. Among Iowa's 99 counties, though, only four have higher rents.
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 Warren County
Bachelor's degrees in Warren County
| Period | Warren County | Des Moines area | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 27.7% | 33.6% | 26.5% | 28.4% |
| 2010–14 | 29.6% | 35.5% | 27.9% | 29.6% |
| 2015–19 | 32.9% | 37.1% | 29.3% | 32.1% |
| 2020–24 | 33.8% | 40.3% | 32.3% | 35.6% |
| Change | +6.0 pts | +6.6 pts | +5.8 pts | +7.2 pts |
College degrees are about as common in Warren County as nationally: 33.8% of adults 25 and older have a bachelor's or higher, against 35.6%. The share is lower than in the Des Moines area overall (40.3%). The share with a degree has risen 6.0 points since 2006–10, mirroring the country. Only eight of Iowa's 99 counties have a higher share of college graduates.
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 Warren County
| Period | Warren County | Des Moines area | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 94.7% | 91.9% | 90.4% | 84.9% |
| 2010–14 | 95.9% | 92.8% | 91.4% | 86.1% |
| 2015–19 | 95.5% | 92.7% | 92.1% | 87.7% |
| 2020–24 | 96.7% | 92.9% | 93.0% | 89.3% |
| Change | +1.9 pts | +1.0 pts | +2.7 pts | +4.3 pts |
High school completion is high in Warren County: 96.7% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%. Since 2006–10, the share with a diploma has risen 1.9 points, as it has nationally. Only five of Iowa's 99 counties have a higher share of high school graduates.
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 Warren County
| Period | Warren County | Des Moines area | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 3.7% | 4.8% | 5.2% | 8.1% |
| 2010–14 | 5.5% | 5.4% | 5.4% | 9.4% |
| 2015–19 | 2.9% | 3.8% | 3.7% | 5.6% |
| 2020–24 | 3.5% | 4.5% | 3.7% | 5.4% |
| Change | −0.1 pts | −0.3 pts | −1.5 pts | −2.7 pts |
Unemployment in Warren County runs below the national rate: 3.5% of the labor force was out of work and looking, against 5.4% nationally. 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).
Warren County compared with nearby counties
| County | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| Warren County | 2.56 | 39.2 | 11.0% | 17.7% | 6.0% | 1986 | $1,078 | 33.8% | 96.7% | 3.5% |
| Madison County | 2.57 | 40.8 | 10.3% | 19.9% | 6.4% | 1977 | $1,076 | 27.0% | 96.7% | 3.3% |
| Marion County | 2.43 | 40.2 | 7.1% | 22.3% | 8.4% | 1976 | $891 | 33.1% | 94.8% | 2.3% |
| Adair County | 2.26 | 43.1 | 6.6% | 26.1% | 9.1% | 1957 | $855 | 19.6% | 94.7% | 3.6% |
| Mahaska County | 2.45 | 39.5 | 9.9% | 32.0% | 9.7% | 1963 | $821 | 24.7% | 93.5% | 3.7% |
| Cass County | 2.23 | 45.1 | 9.9% | 28.4% | 9.5% | 1950 | $797 | 21.7% | 94.4% | 1.5% |
| Keokuk County | 2.45 | 42.9 | 9.7% | 18.7% | 11.6% | 1952 | $817 | 16.9% | 94.3% | 4.3% |
| Washington County | 2.52 | 40.9 | 9.0% | 26.0% | 7.7% | 1966 | $877 | 26.4% | 93.4% | 2.2% |
| Muscatine County | 2.43 | 40.0 | 13.7% | 26.1% | 7.4% | 1968 | $1,008 | 23.5% | 89.7% | 3.0% |
| Washington County | 2.52 | 43.6 | 7.7% | 16.8% | 4.2% | 1974 | $1,007 | 35.9% | 96.1% | 2.1% |
| Dodge County | 2.43 | 38.9 | 11.1% | 33.1% | 9.6% | 1964 | $1,066 | 22.0% | 88.1% | 3.5% |
All figures 2020–24.
Counties with similar populations: Franklin County, VT · Eagle County, CO · Eddy County, NM · Edgecombe County, NC · Elko County, NV · Erath County, TX · Franklin County, KY · Franklin County, NY · Franklin County, VA · Duplin County, NC
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 Warren County. 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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