Linneus is a small city in Linn County, Missouri, United States.

There were 149 housing units at an average density of 139.3 per square mile (53.8/km2).

The racial makeup of the city was 98.6% White, 1.1% African American, and 0.4% Asian.

33.3% of all households were made up of individuals, and 16.7% had someone living alone who was 65 years of age or older.

The racial makeup of the town was 98.37% White, 1.08% African American, 0.27% Asian, 0.27% from other races.

32.0% of all households were made up of individuals, and 19.0% had someone living alone who was 65 years of age or older.