S.D. Codified Laws § 25-4-3 (2026)
Adultery is the voluntary sexual intercourse of a married person with one of the opposite sex to whom he or she is not married. The effective date of this section is July 1, 1984.
Source: SDC 1939, § 14.0704; repealed SL 1976, ch 158 , § 22-8 ; re - enacted SL 1984, ch 12 , § 38; SL 1985, ch 15 , § 36.