Knox County, Illinois
Knox County, Illinois, had an estimated population of 47,767 in 2025 across 1,855 km². The figures below come from the US Census Bureau's population estimates and the American Community Survey, each shown with its own vintage and its rank among Illinois's counties and nationally.
- Population
- 47,767
- 2025 estimate
- Area
- 1,855 km²
- Density
- 26
- per km²
- Median income
- $57,030
- household, ACS 2024
- Median age
- 42.6
- years, ACS 2024
How Illinois's counties spread
Amenities & Infrastructure
| Indicator | Value | In Illinois | In the US |
|---|---|---|---|
| Households with Broadband2024 | 84.0% | 81 / 102 | 2,232 / 3,144 |
| Median Gross Rent2024 | $788 | 64 / 102 | 2,194 / 3,137 |
| Median Home Value2024 | $111,900 | 76 / 102 | 2,773 / 3,139 |
| Owner-Occupied Homes2024 | 70.8% | 85 / 102 | 2,147 / 3,144 |
| Vacant Homes2024 | 11.7% | 40 / 102 | 1,921 / 3,144 |
Demography
| Indicator | Value | In Illinois | In the US |
|---|---|---|---|
| Aged 65 and Over2024 | 22.2% | 27 / 102 | 938 / 3,144 |
| American Indian & Alaska Native2024 | 0.0% | 62 / 102 | 2,461 / 3,144 |
| Asian, non-Hispanic2024 | 1.3% | 22 / 102 | 806 / 3,144 |
| Average Household Size2024people | 2.2 | 95 / 102 | 2,924 / 3,144 |
| Black, non-Hispanic2024 | 8.0% | 19 / 102 | 852 / 3,144 |
| Foreign-Born2024 | 3.2% | 27 / 102 | 1,452 / 3,144 |
| Hispanic or Latino2024 | 6.4% | 27 / 102 | 1,304 / 3,144 |
| Median Age2024years | 42.6 | 50 / 102 | 1,244 / 3,144 |
| Sex Ratio2024per 1,000 males | 962 | 79 / 102 | 2,334 / 3,144 |
| Speak a Language Other Than English2024 | 5.2% | 31 / 102 | 1,652 / 3,144 |
| Under 182024 | 20.2% | 75 / 102 | 2,195 / 3,144 |
| Veterans2024 | 7.3% | 52 / 102 | 1,487 / 3,144 |
| White, non-Hispanic2024 | 79.9% | 77 / 102 | 1,596 / 3,144 |
Economy
| Indicator | Value | In Illinois | In the US |
|---|---|---|---|
| Below Poverty Line2024 | 14.6% | 29 / 102 | 1,260 / 3,144 |
| Households on SNAP2024 | 15.4% | 39 / 102 | 885 / 3,144 |
| Income Inequality2024index | 0.454 | 21 / 102 | 1,255 / 3,144 |
| Median Household Income2024 | $57,030 | 89 / 102 | 2,328 / 3,143 |
| Per Capita Income2024 | $31,878 | 89 / 102 | 2,122 / 3,144 |
| Unemployment Rate2024 | 5.1% | 29 / 102 | 1,070 / 3,144 |
Education
| Indicator | Value | In Illinois | In the US |
|---|---|---|---|
| Bachelor's Degree or Higher2024 | 21.0% | 48 / 102 | 1,754 / 3,144 |
| High School or Higher2024 | 89.9% | 75 / 102 | 1,638 / 3,144 |
Health Coverage
| Indicator | Value | In Illinois | In the US |
|---|---|---|---|
| No Health Insurance2024 | 5.0% | 53 / 102 | 2,524 / 3,144 |
| With a Disability2024 | 15.0% | 59 / 102 | 1,862 / 3,144 |
Population & Density
| Indicator | Value | In Illinois | In the US |
|---|---|---|---|
| Population2025 | 47,767 | 30 / 102 | 1,041 / 3,144 |
| Population Density2025/km² | 26 | 35 / 102 | 1,195 / 3,144 |
Work & Commute
| Indicator | Value | In Illinois | In the US |
|---|---|---|---|
| Commute by Public Transit2024 | 0.5% | 32 / 102 | 782 / 3,144 |
| Households with No Vehicle2024 | 8.6% | 17 / 102 | 438 / 3,144 |
| Mean Commute Time2024minutes | 20.4 | 79 / 102 | 2,380 / 3,143 |
| Work from Home2024 | 5.7% | 77 / 102 | 2,453 / 3,144 |
Other counties of Illinois
- Adams County
- Alexander County
- Bond County
- Boone County
- Brown County
- Bureau County
- Calhoun County
- Carroll County
- Cass County
- Champaign County
- Christian County
- Clark County
- Clay County
- Clinton County
- Coles County
- Cook County
- Crawford County
- Cumberland County
- De Witt County
- DeKalb County
- Douglas County
- DuPage County
- Edgar County
- Edwards County
- Effingham County
- Fayette County
- Ford County
- Franklin County
- Fulton County
- Gallatin County
- Greene County
- Grundy County
- Hamilton County
- Hancock County
- Hardin County
- Henderson County
- Henry County
- Iroquois County
- Jackson County
- Jasper County
- Jefferson County
- Jersey County
- Jo Daviess County
- Johnson County
- Kane County
- Kankakee County
- Kendall County
- LaSalle County
- Lake County
- Lawrence County
- Lee County
- Livingston County
- Logan County
- Macon County
- Macoupin County
- Madison County
- Marion County
- Marshall County
- Mason County
- Massac County
- McDonough County
- McHenry County
- McLean County
- Menard County
- Mercer County
- Monroe County
- Montgomery County
- Morgan County
- Moultrie County
- Ogle County
- Peoria County
- Perry County
- Piatt County
- Pike County
- Pope County
- Pulaski County
- Putnam County
- Randolph County
- Richland County
- Rock Island County
- Saline County
- Sangamon County
- Schuyler County
- Scott County
- Shelby County
- St. Clair County
- Stark County
- Stephenson County
- Tazewell County
- Union County
- Vermilion County
- Wabash County
- Warren County
- Washington County
- Wayne County
- White County
- Whiteside County
- Will County
- Williamson County
- Winnebago County
- Woodford County
Compare Knox County against every other county on a map, add layers and run a scatter — open the atlas. Sources and vintages for every figure on this page are listed under datasets, or browse all 3,144 counties.