Hermosa is a town near the northern edge of Custer County, South Dakota, United States.

[6] 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.

[7][8] It was given its name, the Spanish for "beautiful", for its views of the Black Hills and the grasslands; the railroad located it a mile uphill from an existing stagecoach stop.

[8] According to the United States Census Bureau, the town has a total area of 0.48 square miles (1.24 km2), all land.

It was replaced in 1889 by a two-story building with a bell tower, which in 1926 was condemned as structurally unsound, but was purchased, moved, and stabilized by the Freemasons, who used it as their lodge until 2000; it has since become a museum, arts venue, and community hall under the Hermosa Arts and History Association.

[8] Tin has been mined near Hermosa, with the ore transported via the railroad, and the town was also a railhead for cattle ranching.

Since the opening of Custer State Park in 1919, Hermosa has also been a recreational gateway to the Black Hills.

Lintz Brothers pizza, originally in the Mount Rushmore Telephone Company building, and Roy's Drive-in, with two 80-foot (24 m) digital screens, attract out-of-towners as well as locals.