Main city: Hill City
Timezone: Central / Mountain
Phone type: Landline
Operator: Qwest Corporation

Hill City, the oldest existing city in Pennington County, South Dakota, United States. The population was 948 at the 2010 census. Hill City is located 26 miles (42 km) southwest of Rapid City on State Highway 16 and on U.S. Route 385 that connects Deadwood to Hot Springs. Hill City is known as the "Heart of the Hills" which is derived from its close proximity to both the geographical center of the Black Hills, and the local tourist destinations. ^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