Camp Crook is an incorporated small town in Harding County, South Dakota, United States, on the Little Missouri River.

[6] The town celebrated 125 years of existence in August 2008 during the annual county fair.

The Custer National Forest, with its Sioux Ranger District office, also celebrated 100 years of having a presence in Camp Crook in 2008.

The town's name honors George Crook, a United States Army officer.

[8] According to the United States Census Bureau, the town has a total area of 0.14 square miles (0.36 km2), all land.

40.6% of all households were made up of individuals, and 12.6% had someone living alone who was 65 years of age or older.

Camp Crook experiences a semi-arid climate (Köppen BSk) with cold, dry winters, and hot, wetter summers.