Fall River is a city in Greenwood County, Kansas, United States.

[5] According to the United States Census Bureau, the city has a total area of 0.22 square miles (0.57 km2), all of it land.

[6] The climate in this area is characterized by hot, humid summers and generally mild to cool winters.

[7] The 2020 United States census counted 131 people, 66 households, and 36 families in Fall River.

45.5% of households consisted of individuals and 21.2% had someone living alone who was 65 years of age or older.

The racial makeup of the city was 95.1% White, 1.2% Native American, 0.6% Asian, and 3.1% from two or more races.

41.3% of all households were made up of individuals, and 22.5% had someone living alone who was 65 years of age or older.

36.5% of all households were made up of individuals, and 23.0% had someone living alone who was 65 years of age or older.

About 15.9% of families and 21.4% of the population were below the poverty line, including 31.8% of those under the age of eighteen and 17.9% of those 65 or over.

The community is served by Fredonia USD 484 public school district.