Denmark is a city in Bamberg County, South Carolina, United States. The population at the 2010 census is 3,538. Denmark is located in northwest Bamberg County at 33°19′16″N 81°8′32″W / 33.32111°N 81.14222°W. U.S. Route 78 and U.S. Route 321 cross in Denmark just north of the downtown area. US 78 leads east 6 miles to Bamberg, the county seat, and west 8 miles to Blackville. US 321 leads north 9 miles to Norway and south 7 miles to Govan.