Long Valley (also Longvalley) is an unincorporated community in Jackson County, South Dakota, United States.

[1] Long Valley has been assigned the ZIP code of 57547.

[2] The town site is located in a long valley.

It is a low basin valley that covers 21 miles (34 km) long by 6 miles (10 km) wide.

This South Dakota state location article is a stub.