Altamont is a town in Deuel County, South Dakota, United States. The population was 32 at the 2020 census.

History

Altamont was platted in 1880. It was named for the hills surrounding the town site.

Demographics

2010 census

As of the census of 2010, there were 34 people, 14 households, and 7 families residing in the town. The population density was . There were 17 housing units at an average density of . The racial makeup of the town was 97.1% White and 2.9% from two or more races.

There were 14 households, of which 35.7% had children under the age of 18 living with them, 42.9% were married couples living together, 7.1% had a female householder with no husband present, and 50.0% were non-families. 50.0% of all households were made up of individuals, and 28.6% had someone living alone who was 65 years of age or older. The average household size was 2.43 and the average family size was 3.71.

The median age in the town was 33.5 years. 35.3% of residents were under the age of 18; 2.9% were between the ages of 18 and 24; 29.4% were from 25 to 44; 14.7% were from 45 to 64; and 17.6% were 65 years of age or older. The gender makeup of the town was 52.9% male and 47.1% female.

2000 census

As of the census