Firesteel (Lakota: Čhaȟlíok'e Otȟúŋwahe[2]) is an unincorporated community on the Cheyenne River Indian Reservation, in Dewey County, South Dakota, United States.

The Lakota named the creek for the flint found on its banks, which they struck against a piece of steel to make fire.

In 1929, a new dragline was purchased by Firesteel Coal Company, and mechanical stripping was made possible.

In 1933, the State Relief Agency opened a new mine about 3/4 of a mile southwest of the town to provide more fuel for people struggling through the Great Depression.

During this time, 30 truckers were paid 35 cents per ton to load and haul the coal from pits to the railcars.

At one point, Firesteel included a flour mill, a bank, several businesses, a school, a 24-hour electricity plant, 70 miles of telephone lines, and a stockyard.

This stockyard turned Firesteel into an important livestock shipping point.

A marker was placed on the townsite in 1991 by the Dewey County Historical Society, which tells the town's history.