Iowa Code » Chapter 595 — MARRIAGE
Iowa Code

Iowa Code § 595.19 (2026)

Void marriages

✓ current as of July 2026
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1. Marriages between the following persons who are related by blood are void:

a. Between a man and his father’s sister, mother’s sister, daughter, sister, son’s daughter, daughter’s daughter, brother’s daughter, or sister’s daughter.

b. Between a woman and her father’s brother, mother’s brother, son, brother, son’s son, daughter’s son, brother’s son, or sister’s son.

c. Between first cousins.

2. Marriages between persons either of whom has a husband or wife living are void, but, if the parties live and cohabit together after the death or divorce of the former husband or wife, such marriage shall be valid. [R60, §4367, 4368; C73, §4030; C97, §3151, 4936; S13, §4936; C24, 27, 31, 35, 39, §10445; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §595.19] 85 Acts, ch 99, §8; 94 Acts, ch 1023, §117 Referred to in §595.18 Incest, see §726.2 \n

Notes of Decisions
Cited in 5 cases, 2004–2015 · leading case: United States v. Windsor, 570 U.S. 744 (2013).
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United States v. Windsor, 570 U.S. 744 (2013). · cites it 2× “Likewise the permissible degree of consanguinity can vary (most States permit first cousins to marry, but a handful— such as Iowa and Washington, see Iowa Code §595.19 (2009); Wash. Rev. Code §26.”
Commonwealth v. Rahim, 805 N.E.2d 13 (Mass. 2004). “2 (2000); Iowa Code § 595.19 (2000); Kan. Stat. Ann.”
State ex rel. Alabama Policy Inst., 200 So. 3d 495 (Ala. 2015). “Likewise the permissible degree of consanguinity can vary (most States permit first cousins to marry, but a handful — such as Iowa and Washington, see Iowa Code § 595.19 (2009); Wash. Rev.Code § 26:04.”
State of Iowa v. Steve Thomas Schneider (Iowa Ct. App. 2015). · cites it 2× “See Iowa Code § 595.19 (2) (providing a marriage is void when either party has a living husband or wife).”
United States v. Windsor (2013). “Likewise the permissible degree of consanguinity can vary (most States permit first cousins to marry, but a handful— such as Iowa and Washington, see Iowa Code §595.19 (2009); Wash. Rev. Code §26.”
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