WI / State law overview

Wisconsin

Wisconsin’s controlled-substance statute prohibits unauthorized possession and specifies penalties for tetrahydrocannabinols.

Statewide THC possession restrictions

Sources reviewed September 30, 2026. Coverage: General THC possession restriction and selected first-offense penalty, not all legal questions.

General possession ruleControlled-substance possession or attempted possession is prohibited unless authorized by chapter 961Official source

Selected THC penaltyA first conviction under § 961.41(3g)(e) may carry up to a $1,000 fine, 6 months imprisonment, or both; qualifying prior offenses can lead to a felonyOfficial source

Details worth checking

This is a limited state-law summary. CBD, hemp, prescription exceptions, local ordinances, and the complete penalty scheme require separate review.
The official consolidation states it includes changes through 2025 Wisconsin Act 247 and orders effective before September 4, 2026. Later changes shown in statute notes need separate attention.

Official sources

Wisconsin Legislature — § 961.41(3g), possession

Regulators & contacts

Agency information checked September 30, 2026.

Wisconsin DATCP — Hemp Resources

Provides hemp and consumer regulatory resources. The DATCP hemp production program ended January 1, 2022; Wisconsin hemp growers are licensed by USDA. This does not establish a state medical or adult-use marijuana market.

Wisconsin DATCP — Hemp Resources — official information and contact routes

Cardcierge

Medical cannabis card information, registration, published fees, and evaluation providers for Wisconsin.

View medical card information

General information, not legal advice. Laws, effective dates, and local policies change. Confirm the applicable rules with official sources before acting.