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Sanborn County is a county located in the state of South Dakota. Based on the 2010 census, the population was 2,355. Its county seat is Woonsocket.
Sanborn is named for Milwaukee Railroad superintendent George W. Sanborn.
County QuickFacts: CensusBureau Quick Facts
Sanborn County, created and organized in 1883, was named for George W. Sanborn, who was division superintendent of the Milwaukee Railroad at the time the line was built through Sanborn County. At the first election in 1884, Forestburg, Letcher and Woonsocket were all bidding for the county seat. Rumor has it that Woonsocket may have won by the votes of the railroad graders working on the line. A recount failed to change the results
As reported by the Census Bureau, the county has a total area of 570 square miles (1,477 km2), of which, 569 square miles (1,474 km2) of it is land and 1 square miles (3 km2) of it (0.21%) is water.
Bordering counties are as follows: