Knox is located in Knox County, Illinois. Knox has a 2025 population of 4,754. Knox is currently declining at a rate of -0.38% annually and its population has decreased by -3.39% since the most recent census, which recorded a population of 4,921 in 2020.
The average household income in Knox is $82,582 with a poverty rate of 11.36%.The median age in Knox is 45.2 years: 38.1 years for males, and 52 years for females.
Data after 2023 is projected based on recent change
The racial composition of Knox includes 96.61% White, and smaller percentages for Two or more races, Asian, Black or African American, Native American and multiracial populations.
White (96.6%)
Two or more races (2.6%)
Asian (0.4%)
Black or African American (0.3%)
Native American (0.1%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 4,702 | 96.61% |
| Two or more races | 128 | 2.63% |
| Asian | 18 | 0.37% |
| Black or African American | 15 | 0.31% |
| Native American | 4 | 0.08% |
Married
Widowed
Divorced
Separated
Never Married
Knox's average per capita income is $47,020. Household income levels show a median of $78,063. The poverty rate stands at 11.36%.
Name | Median | Mean |
|---|---|---|
| Married Families | $103,792 | - |
| Families | $97,083 | $101,080 |
| Households | $78,063 | $82,582 |
| Non Families | $26,875 | $44,539 |
Average Income
Median Household Income
Poverty Rate