Sanborn County on the map of South Dakota as of 2026. Cities, roads, borders and directions in Sanborn County of South Dakota.

Sanborn County is situated in the eastern part of South Dakota. This prominent county is named after George W. Sanborn, president of the Milwaukee Railroad. The area of Sanborn County is about 569 square miles. This county, set up in 1883, is populated today by 2 thousand residents. Woonsocket is the county seat of Sanborn County. This map shows the borders of Sanborn County as well as neighboring counties, including major highways and natural objecsts as of 2026. Zoom in or out of the map using the plus/minus panel. Move the center of this map by dragging it. Also check out the satellite map of Sanborn County.