Wyoming

Restriction reported

Statute defines sex as biological sex at birth for any state law or rule (What is a Woman Act)

Laws cited: Wyo. Stat. Ann. § 8-1-110 (2025 Wyo. Sess. Laws ch. 146, HB 32, House Enrolled Act No. 73)
In effect since: March 14, 2025
Instrument: Statute
Litigation: K.R. v. State ex rel. Dep't of Health, Wyo. Sup. Ct. No. S-26-0014 (docketed 2026-01-12 from Natrona Cty. Dist. Ct. No. 2025-CV-0114877), pending: the district court upheld the Act and denied a birth-certificate sex change (Oct. 2025); the appeal argues equal protection and privacy under the Wyoming Constitution; briefing closed 2026-05-26; oral argument set for 2026-10-13. No court has enjoined or blocked § 8-1-110. Related: State ex rel. Dep't of Health v. E.W., No. S-26-0125 (State's appeal, docketed 2026-05-26, of an Albany County order granting a sex-marker change; argument also 2026-10-13), which E.W.'s counsel says does not challenge the Act's constitutionality.
Researched: September 22, 2026 (Date of the primary-source research; not a legal effective date)

From the source text

under any law or rule and regulation in this state... A person's "sex" means the person's biological sex, either male or female, at birth

Sources

Policy sources

Court sources

Researched from primary sources

Trans Data Initiative research. Researched from primary sources (enacted text, the code on official sites, executive orders, court orders), starting from the Trans Data Initiative legislation tracker's bills. Each determination was checked independently by a second researcher; disputes were settled by a third review. No other tracker's descriptions were used.

A record is what a source reported on the date it was captured, not a legal effective date. An unobserved record is not a finding that no restrictions exist.

Dated records for Wyoming in this area

March 14, 2025 Reviewed primary source

Statute defines sex as biological sex at birth for any state law or rule (What is a Woman Act)

Wyo. Stat. Ann. § 8-1-110 (2025 Wyo. Sess. Laws ch. 146, HB 32, House Enrolled Act No. 73)

Date basis: Effective date in the primary source. Researched September 22, 2026.

Inspect date source(opens another site)PDF, external · HB0032 enrolled act (HEA No. 73), 2025 General Session, creating W.S. 8-1-110(opens another site)PDF, external · HB0032 bill digest: became law without signature 3/14/2025, Chapter 146(opens another site)PDF, external · Wyoming Legislature bill page, HB0032 (2025)(opens another site) · LegiScan locator, WY HB0032 (2025)(opens another site) · Wyo. Sup. Ct. docket S-26-0014, In re Correction of Vital Record, K.R. v. State ex rel. Dep't of Health (pending; oral argument 10/13/2026)(opens another site) · Wyo. Sup. Ct. docket S-26-0125, In re Correction of Vital Record, State ex rel. Dep't of Health v. E.W. (State's appeal; oral argument 10/13/2026)(opens another site) · Wyoming Supreme Court public docket portal (CTEF): Search > Party Search, 'Department of Health'(opens another site)