Population 16,447 · Census ACS 2020–24
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Population and households in Warren County
Household size in Warren County
| Period | Warren County | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 2.44 | 2.69 | 2.68 |
| 2010–14 | 2.45 | 2.71 | 2.73 |
| 2015–19 | 2.33 | 2.66 | 2.71 |
| 2020–24 | 2.30 | 2.58 | 2.65 |
| Change | −0.14 | −0.11 | −0.03 |
Warren County is a place of small households, averaging 2.30 people against 2.65 for the U.S., which points to many singles, couples and roommates and relatively few children. Since 2006–10, household size has dropped from 2.44, a much bigger shift than nationally. Households are largest in the west and smallest in the north.
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 | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 42.1 | 37.6 | 37.7 |
| 2010–14 | 42.2 | 38.5 | 38.6 |
| 2015–19 | 42.1 | 39.6 | 39.6 |
| 2020–24 | 40.2 | 40.2 | 40.1 |
| Change | −1.9 | +2.6 | +2.3 |
Half of the people in Warren County are younger than 40.2 and half are older, close to the national median of 40.1. Since 2006–10, the median age has dropped from 42.1, even as the national median rose. The youngest areas are in the center, the oldest in the southeast.
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 | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 10.6% | 11.7% | 12.3% |
| 2010–14 | 12.6% | 11.7% | 12.3% |
| 2015–19 | 12.2% | 11.1% | 11.6% |
| 2020–24 | 14.6% | 11.3% | 11.6% |
| Change | +4.0 pts | −0.4 pts | −0.6 pts |
Single-parent households are common in Warren County: 14.6% of all households, against 11.6% nationally. The single-parent share has risen 4.0 points since 2006–10, even as the national share fell. No other Illinois county has a higher share of single-parent households.
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 | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 27.5% | 30.8% | 33.3% |
| 2010–14 | 25.9% | 33.1% | 35.6% |
| 2015–19 | 25.7% | 33.9% | 36.0% |
| 2020–24 | 24.8% | 32.9% | 34.8% |
| Change | −2.7 pts | +2.1 pts | +1.5 pts |
About a quarter of households in Warren County rent their homes (24.8%), below the national share of 34.8%; the rest own. Just over half of owners (51.5%) have paid off their mortgages, well above the national share of 39.8%. The renter share is down 2.7 points from 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 | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 13.3% | 10.0% | 11.4% |
| 2010–14 | 10.8% | 10.1% | 11.4% |
| 2015–19 | 11.3% | 9.8% | 11.1% |
| 2020–24 | 10.0% | 8.1% | 9.6% |
| Change | −3.2 pts | −1.9 pts | −1.8 pts |
About as many homes sit empty in Warren County as nationally: 10.0%, against 9.6%. The rate is higher than in Illinois as a whole (8.1%). Vacancy is down 3.2 points from 2006–10, in line with the national trend.
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 | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 1952 | 1966 | 1974 |
| 2010–14 | 1950 | 1967 | 1975 |
| 2015–19 | 1954 | 1968 | 1977 |
| 2020–24 | 1955 | 1970 | 1980 |
| Change | +3 | +4 | +6 |
The housing in Warren County is old by national standards: the median home dates to 1955, against 1980 for the U.S., so buyers will find more older houses, some of them due for updates. Newer construction is concentrated in the northeast, while the northwest has the oldest housing. Only two of Illinois' 102 counties have older 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 | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | $585 | $953 | $965 |
| 2010–14 | $639 | $1,028 | $1,040 |
| 2015–19 | $654 | $1,165 | $1,213 |
| 2020–24 | $784 | $1,428 | $1,571 |
| Change | +$199 | +$475 | +$606 |
Rent in Warren County runs $784 a month at the median, utilities included, well below the U.S. median of $1,571. Rent has climbed $199 a month since 2006–10, up 34%, a slower climb than the nation's. The typical renter here spends 24.3% of household income on rent, comfortably under the 30% mark often used to define affordable rent, and a smaller share than renters pay nationally.
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 | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 19.5% | 31.2% | 28.4% |
| 2010–14 | 20.5% | 32.4% | 29.6% |
| 2015–19 | 25.7% | 34.7% | 32.1% |
| 2020–24 | 22.6% | 37.7% | 35.6% |
| Change | +3.1 pts | +6.5 pts | +7.2 pts |
College degrees are relatively uncommon in Warren County: 22.6% of adults 25 and older hold a bachelor's or higher, well below the national share of 35.6%. The share with a degree has risen 3.1 points since 2006–10, as it has 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 Warren County
| Period | Warren County | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 85.4% | 86.3% | 84.9% |
| 2010–14 | 88.4% | 87.5% | 86.1% |
| 2015–19 | 87.1% | 89.1% | 87.7% |
| 2020–24 | 87.1% | 90.3% | 89.3% |
| Change | +1.6 pts | +4.0 pts | +4.3 pts |
About one in eight adults in Warren County never finished high school, a bit more than nationally: 87.1% have a diploma or equivalent, against 89.3% across the U.S. The share with a diploma has risen 1.6 points since 2006–10, as it has nationally. Warren County has a lower share of high school graduates than at least four in five Illinois counties.
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 | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 7.0% | 8.7% | 8.1% |
| 2010–14 | 10.0% | 10.2% | 9.4% |
| 2015–19 | 7.3% | 6.1% | 5.6% |
| 2020–24 | 3.7% | 6.0% | 5.4% |
| Change | −3.4 pts | −2.7 pts | −2.7 pts |
Unemployment in Warren County runs below the national rate: 3.7% of the labor force was out of work and looking, against 5.4% nationally. Unemployment is down 3.4 points from 2006–10, as it has nationally. Because the Census pools five years of responses (2020–24), these rates smooth over short swings and lag the current 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 | 2.30 | 40.2 | 14.6% | 24.8% | 10.0% | 1955 | $784 | 22.6% | 87.1% | 3.7% |
| Knox County | 2.17 | 43.4 | 10.8% | 29.2% | 13.2% | 1960 | $819 | 21.1% | 90.6% | 4.8% |
| Henderson County | 2.32 | 48.8 | 8.9% | 18.9% | 18.4% | 1968 | $834 | 22.3% | 91.5% | 7.7% |
| Des Moines County | 2.25 | 41.8 | 12.2% | 25.4% | 9.8% | 1960 | $916 | 23.3% | 93.1% | 3.4% |
| Henry County | 2.41 | 41.1 | 11.0% | 25.9% | 10.3% | 1967 | $817 | 23.1% | 91.5% | 1.8% |
| Peoria County | 2.34 | 39.7 | 12.4% | 33.0% | 9.0% | 1969 | $1,059 | 36.3% | 93.4% | 6.0% |
| Van Buren County | 2.54 | 45.9 | 8.9% | 18.4% | 17.5% | 1969 | $655 | 19.3% | 85.1% | 4.5% |
| Woodford County | 2.59 | 41.4 | 7.4% | 14.3% | 7.7% | 1973 | $1,024 | 36.9% | 95.1% | 3.6% |
| Davis County | 2.86 | 37.3 | 8.1% | 16.7% | 10.1% | 1971 | $939 | 16.9% | 81.4% | 3.2% |
| Livingston County | 2.30 | 41.6 | 12.4% | 25.7% | 8.5% | 1958 | $925 | 19.2% | 89.3% | 3.2% |
| Appanoose County | 2.37 | 43.5 | 9.9% | 31.2% | 16.8% | 1962 | $794 | 20.4% | 89.6% | 3.8% |
All figures 2020–24.
Counties with similar populations: Gonzales County, TX · Garvin County, OK · Gasconade County, MO · Geneva County, AL · George County, MS · Gillespie County, TX · Glades County, FL · Gladwin County, MI · Gogebic County, MI · Garrard County, KY
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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