S.D. Codified Laws § 53-9-9
Current with legislation signed by the governor on or before 3/6/2024
Any person who sells the good will of a business may agree with the buyer to refrain from carrying on a similar business within a specified county, city, or other specified area, as long as the buyer or person deriving title to the good will from the seller carries on a like business within the specified geographical area.
SDCL 53-9-9