Lanark is a city located in Carroll County, Illinois. Lanark has a 2025 population of 1,451 . Lanark is currently declining at a rate of -0.82% annually and its population has decreased by -3.91% since the most recent census, which recorded a population of 1,510 in 2020.
The average household income in Lanark is $79,943 with a poverty rate of 14.29%. The median age in Lanark is 36.9 years: 36.2 years for males, and 38.3 years for females. For every 100 females there are 113.3 males.
Data after 2023 is projected based on recent change
The racial composition of Lanark includes 94.77% White, and smaller percentages for Black or African American, other race and multiracial populations.
White (94.77%)
Two or more races (3.77%)
Black or African American (0.86%)
Other race (0.6%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 1,431 | 94.77% |
| Two or more races | 57 | 3.77% |
| Black or African American | 13 | 0.86% |
| Other race | 9 | 0.6% |
Married
Widowed
Divorced
Separated
Never Married
Lanark's average per capita income is $50,100. Household income levels show a median of $66,250. The poverty rate stands at 14.29%.
Name | Median | Mean |
|---|---|---|
| Married Families | $117,778 | - |
| Families | $97,000 | $95,926 |
| Households | $66,250 | $79,943 |
| Non Families | $38,000 | $43,309 |
Average Income
Median Household Income
Poverty Rate