Langford is a town in Marshall County, South Dakota, United States.

[7] According to the United States Census Bureau, the town has a total area of 0.31 square miles (0.80 km2), all land.

The racial makeup of the town was 96.5% White, 2.9% Native American, 0.3% Asian, and 0.3% from two or more races.

39.7% of all households were made up of individuals, and 21.2% had someone living alone who was 65 years of age or older.

44.6% of all households were made up of individuals, and 25.2% had someone living alone who was 65 years of age or older.

About 2.7% of families and 11.3% of the population were below the poverty line, including 9.5% of those under the age of eighteen and 10.7% of those 65 or over.