Linn is a city in Washington County, Kansas, United States.

[6] According to the United States Census Bureau, the city has a total area of 0.34 square miles (0.88 km2), all land.

[7] The 2020 United States census counted 387 people, 153 households, and 94 families in Linn.

There were 164 housing units at an average density of 483.8 per square mile (186.8/km2).

37.3% of households consisted of individuals and 22.2% had someone living alone who was 65 years of age or older.

There were 165 housing units at an average density of 485.3 per square mile (187.4/km2).

34.2% of all households were made up of individuals, and 19% had someone living alone who was 65 years of age or older.

There were 186 housing units at an average density of 556.2 per square mile (214.8/km2).

35.4% of all households were made up of individuals, and 22.0% had someone living alone who was 65 years of age or older.

The community and nearby rural areas are served by Barnes–Hanover–Linn USD 223 public school district.