S.D. Codified Laws § 25-1-9 (2026)
Except as provided in § 25-1-13, no marriage may be contracted in this state unless both individuals applying for the marriage license have attained the age of eighteen at the time the marriage license is issued.
Source: SDC 1939, § 14.0109; SL 1961, ch 52 ; SL 1975, ch 178 , § 1; SL 1993, ch 191 , § 2; SL 2026, ch 118 , § 1.