Linn County's estimated 2025 population is 229,036 with a growth rate of 0.01% in the past year according to the most recent United States census data. Linn County is the 2nd largest county in Iowa. The 2010 population was 211,713 and has seen a growth of 8.18% since that time.
Data after 2023 is projected based on recent change
The racial composition of Linn County includes 84.61% White, 5.82% Black or African American, and smaller percentages for Asian, other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White
Two or more races
Black or African American
Asian
Other race
Native American
Native Hawaiian or Pacific Islander
Race | Population | Percentage (of total) |
|---|---|---|
| White | 194,149 | 84.61% |
| Two or more races | 13,533 | 5.9% |
| Black or African American | 13,344 | 5.82% |
| Asian | 5,212 | 2.27% |
| Other race | 2,509 | 1.09% |
| Native American | 671 | 0.29% |
| Native Hawaiian or Pacific Islander | 45 | 0.02% |
Married
Widowed
Divorced
Separated
Never Married
Linn County's average per capita income is $51,892. Household income levels show a median of $76,421. The poverty rate stands at 9.86%.
Name | Median | Mean |
|---|---|---|
| Married Families | $115,133 | $141,815 |
| Families | $97,372 | $124,252 |
| Households | $76,421 | $101,721 |
| Non Families | $45,888 | $60,037 |
Average Income
Median Household Income
Poverty Rate