Marriages between parents and children, ancestors and descendants of every degree, and between brothers and sisters of the half as well as the whole blood, and between uncles and nieces, or aunts and nephews, and between cousins of the half as well as of the whole blood, are null and void from the beginning, whether the relationship is legitimate or illegitimate. The relationships provided for in this section include such relationships that arise through adoption.
S.D. Codified Laws § 25-1-6
Incestuous marriages void
Applied in 3 court decisions — leading case State v. Lafferty (2006)
Most recently applied in State v. Lafferty (June 2006)
Source: SDC 1939, § 14.0106 (1); SL 1994, ch 165, § 1.
How often courts cite this section
Court decisions citing this, by year. The dip in the last several years is a data-coverage gap, not a real trend — our corpus holds fewer opinions from the most recent years, so recent citations are undercounted.
Official source: South Dakota Legislature. Reproduced from public-domain South Dakota statutes; confirm against the official source for the current text. Not legal advice.