Linn County's estimated 2026 population is 236,482 with a growth rate of 1.01% 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 11.7% 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 (84.61%)
Two or more races (5.9%)
Black or African American (5.82%)
Asian (2.27%)
Other race (1.09%)
Native American (0.29%)
Native Hawaiian or Pacific Islander (0.02%)
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