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Wyoming Statewide Rule

Wyoming Weed and Pest Control Act Statewide Framework

Some RestrictionsApplies statewide across Wyoming (2026)

Key Facts

Statute
W.S. 11-5-101 et seq.
Districts
One per county
Funding cap
One mill levy
Coverage
All Wyoming land
Oversight
WY Weed and Pest Council
Last verified: August 21, 2026Source: Justia Law

Summary

The Wyoming Weed and Pest Control Act establishes a uniform statewide system of county weed and pest districts that designate noxious weeds, levy taxes, and require landowners, including municipalities, to control listed species on all property.

11-5-109. Inspection of land; remedial requirements; cost to landowner. (a) Whenever the district board has probable cause to believe that a landowner's property is infested by weeds or pests which are liable to spread and contribute to the injury or detriment of others and the board has provided written notice of probable cause to the landowner, it shall make or have made an inspection of the suspected premises through the use of lawful entry procedures. No entry upon any premises, lands or places shall be permitted under this subsection until the landowner or occupant has been notified by certified mail and, if the landowner has consented to receive notices electronically, by electronic means that provide actual notice to the landowner or occupant that the inspection is pending at least fifteen (15) days prior to the inspection.

Full Breakdown

Wyoming Statutes Title 11, Chapter 5 organize all land in the state into county weed and pest control districts that operate uniformly across federal, state, private, and municipal property. The Wyoming Weed and Pest Council manages a state designated list, and each district may declare additional county weeds. Landowners must control listed noxious weeds, and districts may enter property to treat infestations and recover costs. County commissioners levy a property tax not to exceed one mill on assessed valuation to fund the program. Municipal weed ordinances must operate consistently with this statewide framework rather than override designated weed status.

Violations & Penalties

Failure to control designated noxious weeds may trigger district treatment of the property with costs assessed against the landowner as a lien collected with property taxes.

Frequently Asked Questions

Are city weed ordinances allowed in Wyoming?
Cities may enact weed rules, but the state designated noxious weed list and county district authority apply universally and cannot be overridden by local ordinance.
Who enforces noxious weed control in Wyoming?
Each county weed and pest district enforces designated and declared weed control, coordinating with landowners and recovering treatment costs through property tax liens when necessary.
Does the law apply to municipal property?
Yes. The Act expressly includes municipally owned land within county weed and pest control districts, requiring cities to control designated noxious weeds on city property.

Sources

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