Hermosa is a town near the northern edge of Custer County, South Dakota, United States. The population was 382 at the 2020 census.

History

Hermosa was developed by the Fremont, Elkhorn and Missouri Valley Railroad, later acquired by the Chicago and North Western Railway, and was platted in 1886. A post office has been in operation in Hermosa since 1886.

A Titan missile silo was located near Hermosa from the early 1960s.

Demographics

2010 census

As of the census of 2010, there were 398 people, 158 households, and 110 families living in the town. The population density was . There were 183 housing units at an average density of . The racial makeup of the town was 88.7% White, 3.8% Native American, 1.0% Asian, 0.3% Pacific Islander, 0.5% from other races, and 5.8% from two or more races. Hispanic or Latino of any race were 5.3% of the population.

There were 158 households, of which 33.5% had children under the age of 18 living with them, 51.9% were married couples living together, 10.8% had a female householder with no husband present, 7.0% had a male householder with no wife present, and 30.4% were non-families. 20.9% of all households were made up of individuals, and 8.3% consisted of someone living alone who was 65 years of age or older. The average household size was 2.52 and the average family size was 2.93.

The median age in the town was 36.8 years. 25.9% of residents were under the age of 18; 7.8% were between the ages of 18 and 24; 25.3% were between 25 and 44; 29.3% were between 45 and 64; and 11.6% were 65 or older. The gender makeup of the town was 50.3% male and 49.7% female.

2000 census

As of the census