Indiana generally, where cousin marriage laws are clearly defined. Indiana Code § 31-11-1-2 prohibits marriages between individuals more closely related than second cousins, making first cousin unions illegal unless both parties are at least 65 years old.
Such restricted marriages are void, while second cousins and more distant relatives face no barriers beyond standard licensing.
Indiana’s Core Statute
Under IC § 31-11-1-2, first cousins cannot legally wed without the age exception, reflecting concerns over genetic risks despite no criminal penalties for the act itself. The law states: “Two (2) individuals may not marry each other if the individuals are more closely related than second cousins,” with the sole carve-out for first cousins both aged 65+. Licenses are denied at county clerks if kinship violates this; post-ceremony, courts declare invalid unions void ab initio.
Exceptions and Definitions
First cousins (sharing grandparents) qualify only at 65+, presumed past childbearing years. Second cousins (sharing great-grandparents) marry freely, as do first cousins once removed. Adopted cousins follow blood relation rules unless judicially severed; half-cousins align with full. No residency requirement exists, but out-of-state first cousin marriages aren’t automatically recognized if void under Indiana law.
Application Process Impacts
Clerks verify no closer-than-second-cousin ties via affidavits or records during 60-day license issuance ($40+ fee). Intoxication, unsound mind, or bigamy also bar; kinship flags prompt denial. Civil ceremonies require officiants; violations risk nullity without refunds.
| Relation | Legal to Marry? | Age Exception | Void if Violated? |
|---|---|---|---|
| First cousins | No | Both 65+ | Yes |
| Second cousins | Yes | None needed | No |
| First once-removed | Yes | N/A | No |
| Siblings/parent-child | No | None | Yes, criminal |
Penalties and Consequences
No criminal charges for solemnizing invalid cousin marriages, but civil effects dominate: no spousal rights, inheritance severed, divorce unnecessary as void. Bigamy charges (§ 31-11-1-3) arise if prior spouse lives; cohabitation/relations legal sans marriage. Children from void unions retain legitimacy if parents later validate.
Genetic and Social Context
Indiana’s rule mirrors 30+ states restricting first cousins, citing 4-7% birth defect risks vs. 3% baseline. Exceptions like 65+ acknowledge reduced fertility; critics note cultural acceptance elsewhere (e.g., 19 states fully allow). No 2026 amendments; stable since 1997 recodification.
Out-of-State and Interstate Issues
Indiana residents’ void out-of-state first cousin marriages remain invalid locally, per public policy. Reciprocal recognition applies to valid distant-cousin unions; federal benefits (SSI, taxes) follow domicile state. Border counties (e.g., near Ohio/Kentucky, both restrictive) see cross-checks.
Practical Advice
Trace genealogy via Ancestry/DNA; clerks accept sworn statements but probe close ties. Attorneys draft waivers for edge cases; appeals rare post-denial. Alternatives: common-law absent formalization, or relocate to permissive states like AZ.
Recent Trends
Post-Obergefell, equality confirmed; no cousin expansions amid national debates. Advocacy dormant; rural clerks stricter on proofs.
SOURCES:
- https://www.in.gov/courts/services/marriage-license/
- https://law.justia.com/codes/indiana/title-31/article-11/chapter-1/section-31-11-1-2/












