Dewey County Map
The County of Dewey is located in the State of South Dakota. Find directions to Dewey County, browse local businesses, landmarks, get current traffic estimates, road conditions, and more. According to the 2020 US Census the Dewey County population is estimated at 5,789 people. The Dewey County time zone is Mountain Daylight Time which is 7 hours behind Coordinated Universal Time (UTC).
Nearby counties include Corson County, Haakon County, Potter County, Stanley County, Sully County, Walworth County, Ziebach County.
Top cities include Eagle Butte, Timber Lake, Isabel, La Plant, Green Grass