Blue Mound is a city in Linn County, Kansas, United States.

It was named by its first postmaster, John Q. Adams, because its elevation is said to look blue from a distance.

[4] According to the United States Census Bureau, the city has a total area of 0.63 square miles (1.63 km2), all of it land.

[5] The 2020 United States census counted 219 people, 95 households, and 50 families in Blue Mound.

33.7% of households consisted of individuals and 17.9% had someone living alone who was 65 years of age or older.

[7] The 2016-2020 5-year American Community Survey estimates the median family income was $42,083 (+/- $15,738).

27.9% of all households were made up of individuals, and 10.8% had someone living alone who was 65 years of age or older.

The racial makeup of the city was 98.56% White, 0.72% Native American, and 0.72% from two or more races.

About 12.5% of families and 18.8% of the population were below the poverty line, including 12.0% of those under the age of eighteen and 17.8% of those 65 or over.