Wisconsin
Psilocybin is illegal in Wisconsin as of 18 Aug 2026.1
- Checked against 2 cited sources at this review.
1. What the law is
Wis. Stat. § 961.14(4)(r) (Schedule I: Psilocybin) and § 961.14(4)(s) (Schedule I: Psilocin); penalties at § 961.41 reference ‘psilocin and psilocybin’1
Two paragraphs of Wis. Stat. 961.14(4) do the work: one lists psilocybin, the next psilocin, with penalties set at 961.41. Neither listing has moved through 2026.
Psilocybin is illegal in Wisconsin, where it is classified as a Schedule I controlled substance under the state's Uniform Controlled Substances Act. Wis. Stat. § 961.14(4)(r) lists psilocybin and § 961.14(4)(s) lists psilocin among Schedule I hallucinogenic substances, the most restrictive state schedule. Possession is a criminal offense under Wis. Stat. § 961.41(3g), and manufacture, distribution, or delivery is a felony graded by quantity under § 961.41.
Psilocybin remains a Schedule I controlled substance in Wisconsin as of 2026, and the substance is illegal now; no enacted state law authorizes its possession, use, sale, or supervised administration. Wisconsin has not passed any decriminalization measure or therapeutic-access program. The state legislature considered Senate Bill 727 during the 2023-2024 session, which would have created a medicinal psilocybin treatment fund and a pilot program at the University of Wisconsin-Madison to study the effects of psilocybin on patients with post-traumatic stress disorder; according to the Wisconsin State Legislature's records, that bill failed to pass pursuant to Senate Joint Resolution 1 on April 15, 2024, and never took effect. Because SB 727 was a research-and-study proposal that did not become law, it created no current legal access to psilocybin in Wisconsin.
2. Pending legislation
No bill is on file in Wisconsin that would change this record, as of the 18 Aug 2026 review.
3. History
The laws behind today’s status, when each took effect, and every review since, in order.
Senate Bill 727 introduced, proposing a medicinal psilocybin treatment fund and a UW-Madison pilot program studying psilocybin for treatment-resistant PTSD; it advanced no scheduling or access changes, running through 2024.
Senate Bill 727 failed to pass pursuant to Senate Joint Resolution 1, leaving psilocybin's Schedule I status unchanged.
Psilocybin and psilocin remain Schedule I controlled substances under Wis. Stat. § 961.14(4)(r)-(s); no reform legislation has been enacted.
4. Trials in Wisconsin
Interventional psilocybin trials with at least one study site in Wisconsin, drawn from ClinicalTrials.gov, EU CTIS, and ISRCTN. Registry data is reported by sponsors and shown as filed.
Recruiting, active, completed and closed add up to the 10 trials with a study site in Wisconsin, as of Aug 2026. Closed covers trials terminated, suspended, withdrawn or left unverified.
| Registry ID | Trial | Phase | Sponsor | Status | Started |
|---|---|---|---|---|---|
| NCT07360301 (opens in new tab) | Consciousness and Psilocybin Effects on Well-Being: The CoPEWell Study (opens in new tab)Site at University of Wisconsin, Madison | Phase Phase 1 | Sponsor University of Wisconsin, Madison | Status Not yet recruiting | Started |
| NCT06692192 (opens in new tab) | The RECAP2 Study: Midazolam and Psilocybin (opens in new tab)Recruiting at UW School of Medicine and Public Health, Madison | Phase Phase 1 | Sponsor University of Wisconsin, Madison | Status Recruiting | Started |
| NCT05866471 (opens in new tab) | The ENHANCE Study: taVNS and Psilocybin (opens in new tab)Recruiting at University of Wisconsin - Madison, Madison | Phase Phase 1 | Sponsor University of Wisconsin, Madison | Status Recruiting | Started |
| NCT04161066 (opens in new tab) | Adjunctive Effects of Psilocybin and a Formulation of Buprenorphine (opens in new tab)Recruiting at University of Wisconsin, Madison | Phase Phase 1 | Sponsor University of Wisconsin, Madison | Status Recruiting | Started |
| NCT05592379 (opens in new tab) | Consciousness, Psilocybin, and Well-Being (opens in new tab)Site at University of Wisconsin Hospital and Clinics, Madison | Phase Phase 1 | Sponsor University of Wisconsin, Madison | Status Completed | Started |
| NCT05467761 (opens in new tab) | Bioavailability Study of Psilocybin in Normal Adults (opens in new tab)Site at University of Wisconsin, Madison | Phase Phase 1 | Sponsor University of Wisconsin, Madison | Status Withdrawn | Started |
| NCT05322954 (opens in new tab) | Study of the Safety and Feasibility of Psilocybin in Adults With Methamphetamine Use Disorder (opens in new tab)Site at University of Wisconsin, Madison | Phase Phase 1 | Sponsor University of Wisconsin, Madison | Status Terminated | Started |
| NCT04842045 (opens in new tab) | Pilot RECAP Study in Healthy Volunteers (opens in new tab)Site at UWHealth, 600 Highland Avenue, Madison | Phase Phase 1 | Sponsor University of Wisconsin, Madison | Status Completed | Started |
| NCT03866174 (opens in new tab) | A Study of Psilocybin for Major Depressive Disorder (MDD) (opens in new tab)Site at University of Wisconsin - Madison, Madison | Phase Phase 2 | Sponsor Usona Institute | Status Completed | Started |
| NCT02163707 (opens in new tab) | UW Psilocybin Pharmacokinetics Study (opens in new tab)Site at University of Wisconsin, School of Pharmacy, Madison | Phase Phase 1 | Sponsor University of Wisconsin, Madison | Status Completed | Started |
ClinicalTrials.gov data courtesy of the U.S. National Library of Medicine.
5. Common questions
Is psilocybin legal in Wisconsin?
No. Psilocybin is illegal in Wisconsin. It is a Schedule I controlled substance under Wis. Stat. § 961.14(4)(r), and psilocin is listed at § 961.14(4)(s). The state has enacted no decriminalization or therapeutic-access law.
What is the penalty for psilocybin possession in Wisconsin?
Under Wis. Stat. § 961.41(3g), possession of psilocin or psilocybin is a criminal offense; a first conviction is a misdemeanor punishable by up to one year in county jail, a fine of up to $5,000, or both, and a second or subsequent offense is a Class I felony. Manufacture, distribution, or delivery is charged as a felony graded by quantity under § 961.41.
Did Wisconsin's Senate Bill 727 legalize psilocybin?
No. SB 727 (2023-2024) proposed a treatment fund and a University of Wisconsin-Madison pilot program to study psilocybin for PTSD, but according to the Wisconsin State Legislature it failed to pass on April 15, 2024 and never became law. It created no legal access to psilocybin.
Has Wisconsin decriminalized psilocybin?
No. Wisconsin has enacted no statewide or local measure decriminalizing or deprioritizing enforcement against psilocybin. It remains a Schedule I controlled substance under Wis. Stat. § 961.14, and possession and distribution remain enforceable criminal offenses under § 961.41.
Are magic mushrooms ("shrooms") legal in Wisconsin?
"Magic mushrooms" and "shrooms" are common names for fungi that contain psilocybin. Psilocybin is illegal in Wisconsin as of 18 Aug 2026. Some laws control the compound and the fungus separately, so this record states the position for psilocybin in Wisconsin.
Sources and confidence
Every status line is checked against the primary sources below. How each record is graded for confidence is set out in the methodology.
- 1.docs.legis.wisconsin.gov (opens in new tab) · docs.legis.wisconsin.gov
- 2.docs.legis.wisconsin.gov (opens in new tab) · docs.legis.wisconsin.gov
Cited at the review
This information is for educational purposes only and does not constitute legal advice. Laws change frequently, and enforcement practice can differ from the letter of the law. Verify current status with local authorities before relying on this record.
Changes to this record
Every change we have made to this record, dated, corrections included. Nothing changes silently.
Nothing has needed correcting or updating since this record first published.
Wisconsin: psilocybin legal status. The Psilocybin Record. Accession US-WI-001. Status as of 18 Aug 2026. https://psilocybinlegalization.com/record/wisconsin
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