Proposes a constitutional amendment providing that marriage exists only between individuals who are eighteen years of age or older

2026 Regular Session Introduced by Doug Clemens and 1 co-sponsor

Proposes amending Missouri Constitution to ban marriage under 18, allowing only marriages where both spouses are at least 18.

Referred: Emerging Issues(H)

#constitutionalamendments #domesticrelations #marriageanddivorce

Bill Overview

Bill: HJR 127

Session: 2026

Jurisdiction: Missouri

Title: Proposes a constitutional amendment providing that marriage exists only between individuals who are eighteen years of age or older

Purpose: To amend the Missouri Constitution to restrict marriage to individuals who are at least 18 years old

Key Provisions

Constitutional amendment proposal: The measure would add a new provision to the Missouri Constitution specifying that marriage may be formed only between individuals who are eighteen years of age or older.

Age threshold: The age requirement set by the amendment is 18 years or older for both parties entering into a marriage.

Scope: Applies to the legal definition of marriage within the state’s constitution, potentially superseding any conflicting statutory provisions.

Who or What Would Be Affected

Individuals seeking to marry in Missouri: Couples would be subject to the new age threshold, ensuring that marriages involving anyone under 18 would not be recognized under the state constitution.

State government and courts: The definition of marriage in the state constitution would change, guiding future statutory interpretation and judicial decisions related to marital recognition.

Domestic policy landscape: Could influence related areas such as parental consent, underage marriage restrictions, and any existing statutes that define marriage or regulate marital contracts.

Procedural and Timeline Aspects

Prefiled: December 1, 2025

First Reading: January 7, 2026

Second Reading: January 8, 2026

Referred: Emerging Issues (H) on May 15, 2026

Path forward: As a joint resolution (HJR), this bill would typically proceed through the Senate and House as a constitutional amendment. If both chambers adopt the resolution, it would usually be placed on the ballot for voter approval in a future election. Final adoption requires a majority vote in both chambers and subsequent voter ratification.

Additional Context

Sponsorship: Co-sponsors include Wick Thomas and Doug Clemens.

Nature of measure: As a constitutional amendment proposal (HJR), the bill does not become law by statute alone; it would require voter ratification to amend the Missouri Constitution.

Considerations for debate: Potential discussions may focus on the sufficiency and clarity of the age threshold, potential implications for existing marriages with underage individuals, enforcement mechanisms, and alignment with other state and federal legal frameworks on marriage, minors’ rights, and parental consent.

If you’d like, I can compare this proposal to current Missouri constitutional provisions on marriage or outline potential legal and social implications in more detail.