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Tyndall (pronounced TIN'-duhl) is a city in Bon Homme County, South Dakota, United States. The population was 1,365 at the 2010 census. It is the county seat of Bon Homme County.
Tyndall is located at 42°59′30″N 97°51′49″W / 42.991775°N 97.863539°W / 42.991775; -97.863539.
According to the United States Census Bureau, the city has a total area of 1.6 square miles (4.1 km2), all of it land.