Wyoming Statute of Limitations: Civil and Criminal Deadlines by Case Type

Wyoming's statutes of limitations establish mandatory filing deadlines for civil and criminal matters, and missing these deadlines typically bars a claim permanently. This page maps the primary limitation periods under Wyoming law, organized by case type, and identifies the procedural rules that govern when the clock starts, stops, or resets. The framework spans Wyoming civil litigation, criminal prosecution timelines, and the regulatory context that courts apply when interpreting these deadlines.

Definition and scope

A statute of limitations is a legislatively enacted deadline that requires a legal action — whether a civil lawsuit or a criminal charge — to be initiated within a specified period after the triggering event. Wyoming's limitation periods are codified primarily in Wyoming Statutes Title 1, Chapter 3 for civil matters and in Wyoming Statutes Title 7 for criminal procedure. The Wyoming Supreme Court has authority to interpret ambiguities in these statutes and to establish procedural rules governing how limitation periods interact with court filing requirements under the Wyoming Rules of Civil Procedure.

Scope of this page: This reference covers limitation periods arising under Wyoming state law, applied in Wyoming state courts. It does not address federal limitation periods applicable in federal district court, tribal court jurisdictions (addressed separately at wyoming-tribal-law-and-sovereignty), or limitations periods that may be imposed by contract. Interstate disputes where another state's law governs the underlying claim fall outside this page's coverage. For broader regulatory framing of how Wyoming law operates within the U.S. system, see the regulatory context for Wyoming's legal system.

How it works

The limitation period begins running from the date a cause of action "accrues." Accrual is the point at which a plaintiff has suffered a cognizable legal injury and knows, or reasonably should know, of that injury. Wyoming courts apply the discovery rule in categories where the injury is inherently latent — medical malpractice and fraud being the primary examples — meaning accrual is delayed until the injured party discovers or should have discovered the harm.

Tolling suspends the running of the statute. Wyoming law recognizes tolling in four principal circumstances:

1. Minority — the claimant is under 18 years of age at the time the cause of action accrues; the period is tolled until the claimant reaches majority.
2. Legal incapacity — mental incompetence at the time of accrual delays the clock.
3. Fraudulent concealment — a defendant's active concealment of facts giving rise to the claim tolls the period for the duration of the concealment.
4. Absence of the defendant from Wyoming — periods during which a defendant is absent from the state may be excluded from the running clock under Wyo. Stat. § 1-3-116.

For criminal matters, the limitation period begins when the offense is committed. Wyoming does not impose a statute of limitations on murder or on crimes punishable by life imprisonment, making prosecution possible at any point after the offense.

Common scenarios

The following limitation periods reflect Wyoming Statutes Title 1, Chapter 3 and related provisions:

Civil versus criminal contrast: Civil limitation periods protect defendants from stale claims where evidence may have deteriorated, and the burden to file falls entirely on the plaintiff. Criminal statutes of limitations serve the additional constitutional function of protecting accused persons' due process rights — specifically the right to mount a timely defense. The Wyoming civil litigation process and the Wyoming criminal procedure frameworks each treat accrual and tolling with distinct procedural mechanics.

Property and contract claims illustrate the largest spread in civil law: a written contract claim survives for 10 years, while a libel claim expires in just 1 year. This 10-fold difference reflects legislative judgments about evidentiary preservation and the social cost of prolonged liability exposure.

For matters involving Wyoming tort law, particularly product liability or toxic exposure cases, the discovery rule is frequently contested, as courts must determine the moment a plaintiff reasonably should have linked the injury to the defendant's conduct.

Decision boundaries

Three conditions determine whether a limitation period bars a claim:

1. Has the period expired? The court calculates elapsed time from the date of accrual (or discovery, where applicable) to the date of filing. Filing means delivery to the clerk of court, not service on the defendant.
2. Does a tolling exception apply? Any of the four tolling categories listed above must be affirmatively established by the party seeking tolling; tolling is not presumed.
3. Has the defendant waived the defense? The statute of limitations is an affirmative defense under Wyoming Rule of Civil Procedure 8(c); failure to assert it in a responsive pleading may result in waiver.

A claim that survives all three tests proceeds on its merits. A claim extinguished by an expired limitation period is dismissed with prejudice — it cannot be re-filed. This finality distinguishes statutes of limitations from procedural filing defects, which typically permit correction.

Criminal charging decisions by the Wyoming Attorney General's Office or county prosecutors are also constrained by these periods. A felony indictment returned more than 5 years after an offense — absent a tolling exception or a capital charge — will be dismissed on limitations grounds.

The full landscape of Wyoming's legal system, including how limitation periods interact with court jurisdiction tiers, is indexed at the Wyoming Legal Authority main index.

References

• Wyoming Statutes Title 1, Chapter 3 — Civil Limitation Periods (Wyoming Legislature)
• Wyoming Statutes Title 7 — Criminal Procedure and Limitation Periods (Wyoming Legislature)
• Wyoming Rules of Civil Procedure — Wyoming Judicial Branch
• Wyoming Legislature — Official Statutory Database
• Wyoming Supreme Court — Rules and Orders