Farmer is a town in Hanson County, South Dakota, United States.

It is part of the Mitchell, South Dakota Micropolitan Statistical Area.

[6] A post office called Farmer was established in 1890, and remained in operation until it was discontinued in 1992.

According to the United States Census Bureau, the town has a total area of 0.08 square miles (0.21 km2), all land.

There were 9 housing units at an average density of 112.5 per square mile (43.4/km2).

There were 10 housing units at an average density of 156.9 per square mile (60.6/km2).

28.6% of all households were made up of individuals, and 14.3% had someone living alone who was 65 years of age or older.