Linn County's 2026 population is estimated at 11,756, reflecting a -0.5% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Linn County is the 78th largest county in Missouri. The 2010 population was 12,774 and has grown -7.97% since 2010.
Overall: 42.1 years
Female: 43.5 years
Male: 40.9 years
There are 9,088 adults, (2,580 of whom are seniors) in Linn County.
Female: 6,059 (51.1%)
Male: 5,793 (48.9%)
The racial composition of Linn County includes 94.45% White, and smaller percentages for Black or African American, other race, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 11,194 | 94.45% |
| Two or more races | 407 | 3.43% |
| Black or African American | 97 | 0.82% |
| Other race | 57 | 0.48% |
| Asian | 52 | 0.44% |
| Native American | 33 | 0.28% |
| Native Hawaiian or Pacific Islander | 12 | 0.1% |
Linn County 's average per capita income is $42,464. Household income levels show a median of $61,635. The poverty rate stands at 13.74%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $89,297 | - |
| Families | $80,128 | $96,469 |
| Households | $61,635 | $82,789 |
| Non Families | $38,409 | $57,603 |
Average Income
Median Household Income
Poverty Rate
