Population 12,784 · Census ACS 2020–24
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Population and households in Cass County
Household size in Cass County
| Period | Cass County | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 2.62 | 2.69 | 2.68 |
| 2010–14 | 2.55 | 2.71 | 2.73 |
| 2015–19 | 2.45 | 2.66 | 2.71 |
| 2020–24 | 2.49 | 2.58 | 2.65 |
| Change | −0.13 | −0.11 | −0.03 |
The average household in Cass County has 2.49 people, a bit under the U.S. average of 2.65. Since 2006–10, household size has dropped from 2.62, a much bigger shift than nationally. Households are largest in the northwest and smallest in the northeast.
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 Cass County
| Period | Cass County | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 38.4 | 37.6 | 37.7 |
| 2010–14 | 38.9 | 38.5 | 38.6 |
| 2015–19 | 39.7 | 39.6 | 39.6 |
| 2020–24 | 39.1 | 40.2 | 40.1 |
| Change | +0.7 | +2.6 | +2.3 |
Half of the people in Cass County are younger than 39.1 and half are older, close to the national median of 40.1. The median age has crept up from 38.4 in 2006–10, a smaller shift than nationally. Only six of Illinois' 102 counties are younger.
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 Cass County
| Period | Cass County | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 11.8% | 11.7% | 12.3% |
| 2010–14 | 11.0% | 11.7% | 12.3% |
| 2015–19 | 13.6% | 11.1% | 11.6% |
| 2020–24 | 11.3% | 11.3% | 11.6% |
| Change | −0.5 pts | −0.4 pts | −0.6 pts |
Single parents head nearly one in eight households in Cass County (11.3%), close to the national share of 11.6%. The single-parent share has edged down 0.5 points since 2006–10, as it has 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 Cass County
Renters in Cass County
| Period | Cass County | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 28.6% | 30.8% | 33.3% |
| 2010–14 | 27.9% | 33.1% | 35.6% |
| 2015–19 | 25.4% | 33.9% | 36.0% |
| 2020–24 | 24.1% | 32.9% | 34.8% |
| Change | −4.5 pts | +2.1 pts | +1.5 pts |
Only 24.1% of households in Cass County rent their homes, far below the national share of 34.8%, so most residents are owners who tend to stay put. Among homeowners, 50.8% have no mortgage at all, well above the national share of 39.8%. Renting is most common in the northwest and least common in the center. The renter share has fallen 4.5 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 Cass County
| Period | Cass County | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 13.4% | 10.0% | 11.4% |
| 2010–14 | 10.3% | 10.1% | 11.4% |
| 2015–19 | 14.1% | 9.8% | 11.1% |
| 2020–24 | 11.2% | 8.1% | 9.6% |
| Change | −2.2 pts | −1.9 pts | −1.8 pts |
Vacancy runs a little high in Cass County: 11.2% of homes are empty, against 9.6% nationally. The count includes vacation homes and homes between owners or tenants, not just abandoned ones. Vacancy has fallen 2.2 points since 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 Cass County
| Period | Cass County | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 1955 | 1966 | 1974 |
| 2010–14 | 1958 | 1967 | 1975 |
| 2015–19 | 1963 | 1968 | 1977 |
| 2020–24 | 1966 | 1970 | 1980 |
| Change | +12 | +4 | +6 |
Cass County is a place of older homes: half were built before 1966, while the national median is 1980. That means established neighborhoods, and more houses that may need updating. The median year built has moved up from 1955 in 2006–10, a sign of steady new building. The newest homes are mostly in the center, the oldest in the northeast.
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 Cass County
| Period | Cass County | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | $587 | $953 | $965 |
| 2010–14 | $627 | $1,028 | $1,040 |
| 2015–19 | $633 | $1,165 | $1,213 |
| 2020–24 | $745 | $1,428 | $1,571 |
| Change | +$158 | +$475 | +$606 |
A typical rental in Cass County costs $745 a month with utilities, well below the national median of $1,571. Rent has climbed $158 a month since 2006–10, up 27%, a slower climb than the nation's. The typical renter here spends 24.5% of household income on rent, comfortably under the 30% mark often used to define affordable rent, and a smaller share than renters pay nationally. Renters on a budget will find the lowest rents in the west; the highest are in the northeast.
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 Cass County
Bachelor's degrees in Cass County
| Period | Cass County | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 12.4% | 31.2% | 28.4% |
| 2010–14 | 13.2% | 32.4% | 29.6% |
| 2015–19 | 14.2% | 34.7% | 32.1% |
| 2020–24 | 20.3% | 37.7% | 35.6% |
| Change | +7.9 pts | +6.5 pts | +7.2 pts |
College degrees are relatively uncommon in Cass County: 20.3% 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 7.9 points since 2006–10, in line with the national trend. College graduates are most concentrated in the center and least in the northwest.
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 Cass County
| Period | Cass County | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 80.1% | 86.3% | 84.9% |
| 2010–14 | 84.5% | 87.5% | 86.1% |
| 2015–19 | 83.4% | 89.1% | 87.7% |
| 2020–24 | 84.7% | 90.3% | 89.3% |
| Change | +4.7 pts | +4.0 pts | +4.3 pts |
Just over one in seven adults in Cass County never finished high school, more than nationally: 84.7% have a diploma or equivalent, against 89.3% across the U.S. Since 2006–10, the share with a diploma has risen 4.7 points, mirroring the country. Few Illinois counties have a lower share of high school graduates: only two of 102.
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 Cass County
| Period | Cass County | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 7.9% | 8.7% | 8.1% |
| 2010–14 | 10.5% | 10.2% | 9.4% |
| 2015–19 | 6.7% | 6.1% | 5.6% |
| 2020–24 | 3.9% | 6.0% | 5.4% |
| Change | −4.0 pts | −2.7 pts | −2.7 pts |
Unemployment in Cass County runs below the national rate: 3.9% of the labor force was out of work and looking, against 5.4% nationally. Unemployment has fallen 4.0 points since 2006–10, mirroring the country. 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).
Cass 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Cass County | 2.49 | 39.1 | 11.3% | 24.1% | 11.2% | 1966 | $745 | 20.3% | 84.7% | 3.9% |
| Brown County | 1.98 | 42.5 | 9.7% | 28.2% | 9.4% | 1967 | $707 | 13.2% | 78.6% | 2.6% |
| Menard County | 2.33 | 43.6 | 10.5% | 20.5% | 6.1% | 1975 | $879 | 28.5% | 94.8% | 3.5% |
| Adams County | 2.32 | 42.2 | 10.5% | 27.9% | 8.2% | 1965 | $951 | 27.9% | 94.0% | 3.8% |
| Lewis County | 2.88 | 37.4 | 4.9% | 23.7% | 25.9% | 1970 | $673 | 17.7% | 87.7% | 7.3% |
| Macon County | 2.35 | 41.6 | 11.1% | 29.8% | 12.2% | 1965 | $890 | 24.4% | 92.8% | 7.4% |
| Piatt County | 2.41 | 44.2 | 6.8% | 15.2% | 6.6% | 1972 | $1,124 | 32.5% | 96.3% | 3.0% |
| Grundy County | 2.48 | 40.9 | 7.0% | 30.3% | 19.7% | 1962 | $792 | 16.6% | 86.8% | 2.9% |
| Montgomery County | 2.44 | 40.4 | 9.7% | 19.7% | 7.0% | 1964 | $860 | 20.5% | 89.4% | 3.5% |
| Daviess County | 2.81 | 40.1 | 7.7% | 20.9% | 24.4% | 1978 | $687 | 18.0% | 84.4% | 1.8% |
| Boone County | 2.65 | 39.6 | 9.0% | 21.2% | 4.2% | 1988 | $1,477 | 52.6% | 94.8% | 2.5% |
All figures 2020–24.
Counties with similar populations: Newton County, MS · Jasper County, MS · Jayuya Municipio, PR · Jo Daviess County, IL · Monroe County, IA · Montgomery County, AR · New Kent County, VA · New Madrid County, MO · Newton County, IN · Jackson County, TX
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 Cass 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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