South Dakota Profiles

State map includes counties, congressional districts and census bureau information.
http://www.census.gov/datamap/www/46.html

Color Landform Atlas: South Dakota

Features shaded relief and county maps, 1895 map, black and white and satellite images.
http://fermi.jhuapl.edu/states/sd_0.html

SDGenWeb - Maps

On-line maps of South Dakota and Dakota Territory are available for download.
http://www.rootsweb.com/~sdgenweb/maps/maps.html

South Dakota Maps

From the Perry-Castañeda Library Map Collection. Included with state maps are area and park maps: Badlands National Park, Jewel Cave National Monument, Mount Rushmore and Wind Cave National Park.
http://www.lib.utexas.edu/maps/south_dakota.html

County Maps of South Dakota

Scanned road maps of all 66 counties.
http://south-dakota.2havefun.com/maps/

World Sites Atlas

Features map showing interstate and U.S. highways, plus major cities and towns.
http://www.sitesatlas.com/Maps/Maps/SD1.htm