Washington State: Cannabis Law Overview
Last updated: June 18, 2026
Disclaimer: This page is informational only and not legal advice. Laws change quickly. Always verify on official state portals linked below and follow the strictest applicable rule. See our Legal Disclaimer & No-Warranty and Terms of Use.
Snapshot
- Adult-use (R): Legal; retail licensing and enforcement by the Washington State Liquor & Cannabis Board (WSLCB).
- Medical (M): Administered by the Washington Department of Health (DOH); patient registry, endorsements, and product standards.
- DUI/Impairment: Washington enforces a per se THC limit for driving--see the RCW reference below and DOH/WSLCB resources.
Official Portals & Statutes
- WSLCB (retail & enforcement): https://lcb.wa.gov/
- DOH - Medical Cannabis Program: https://doh.wa.gov/you-and-your-family/cannabis/medical-cannabis
- DUI statute (RCW 46.61.502): https://app.leg.wa.gov/rcw/default.aspx?cite=46.61.502
Practical Notes (Orientation)
- Possession & purchase limits are defined in statute and rule; always verify on WSLCB/DOH before purchase.
- DUI/THC per se: Washington law includes a numeric THC limit (blood ng/mL within two hours of driving). Do not drive while impaired or within windows where impairment is possible.
- Medical benefits: DOH-endorsed stores and patient registration may affect purchase limits/taxes. Check DOH guidance for eligibility and protections.
- Local rules: Some municipalities add zoning/time-place-manner rules for retail. Check local notices when applicable.
Related Reading on 420.place
- United States: Federal & State Overview
- Responsible Use Guide
- Information You Can Trust
- Editorial Standards • How We Fact-Check
- Research Updates
Travel & Federal Property Reminder
Do not carry cannabis across state or national borders, or onto federal property (airports, national parks, federal buildings). Federal law applies regardless of state programs.