Linn County, Missouri Demographics 2026

Population Overview

Linn County is located in Missouri with a total population of 11,850. It is the 76th most populous county out of 115 in Missouri. The county encompasses 9 Census-designated places.

Age Demographics

The median age in Linn County is 42.4 years. This is 9% higher than the state median of 38.9 years.

Economy, Income & Housing

The median household income in Linn County is $61,975. This is 10% lower than the state median of $68,920. It is also 21% lower than the national median of $78,538. The poverty rate stands at 16.2%. This is 28% higher than the state poverty rate of 12.6%. The unemployment rate is 2.6%. This is 36% lower than the state rate of 4.1%. The median home value is $117,300. Housing costs are 46% lower than the state median of $215,600. With a home-value-to-income ratio of just 1.9x, Linn County is one of the most affordable housing markets in the area. 78.7% of occupied housing units are owner-occupied. This homeownership rate is 16% higher than the state average of 67.9%.

Race & Ethnicity

Linn County has a predominantly White (non-Hispanic) population, comprising 93.9% of all residents. Hispanic or Latino residents account for 2.9%. The Black or African American population (0.7%) is well below the state average of 11.0%. The Asian population (0.4%) is well below the state average of 2.1%.

Education

20.1% of residents aged 25 and older hold a bachelor's degree or higher. This is 37% lower than the state rate of 31.9%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 91.5%.

Data Sources & Methodology

All figures for Linn County come from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023), with comparisons drawn against Missouri and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.