Main city: Camp Crook
Timezone: Central / Mountain
Phone type: Landline
Operator: West River Cooperative Telephone Company

Camp Crook, an incorporated small town in Harding County, South Dakota, United States, on the Little Missouri River. Originally named Wickhamville, after one of the original founding families, the town was renamed in April 1883 when the Cheyennes assumed a threatening attitude and their agent called upon the commanding officer of Fort Custer for protection. Major Carrol was dispatched with Troops B, D, and M of the U.S. 1st Cavalry Regiment to the Tongue River Agency, where they established Camp Crook. The population was 63 at the 2010 census. ^source

North American Area code 605 is the telephone area code serving the entire state of South Dakota, and is one of the area codes that was created in 1947. It is also one of a gradually decreasing number of single-state, single LATA, single area code areas. (North Dakota uses only the 701 area code, but is split into two LATAs, one of which includes Minnesota.) ^source