Possession
Massachusetts classifies psilocybin and psilocyn as Class C controlled substances. Knowing possession remains unlawful unless authorized by law.

Cambridge, MA local quick reference
Reviewed July 22, 2026The practical distinction between Massachusetts law, any verified local enforcement policy, and regulated access.
A lowest-enforcement-priority policy is not the same as legalization. Sale, retail, gifting, public use, and conduct outside the policy may remain prohibited.
Massachusetts classifies psilocybin and psilocyn as Class C controlled substances. Knowing possession remains unlawful unless authorized by law.
Massachusetts has no current statewide psilocybin service-center, personal-use, dispensary, or retail program.
Cambridge adopted Policy Order 13403 in 2021 in support of decriminalizing entheogenic plants and plant-based compounds. The order does not change Massachusetts law or legalize commercial sales.
Cambridge’s official 2021 City Council index records Policy Order 13403 as adopted on February 3, 2021 by an 8–1 vote. The order directs city staff to work with state and federal partners in support of decriminalizing entheogenic plants and plant-based compounds. It is a local policy order, not an amendment to Massachusetts criminal law or a retail-licensing measure.
Official record: City of Cambridge — 2021 City Council Index, Policy Order 13403 ↗
Cambridge adopted Policy Order 13403 in 2021 in support of decriminalizing entheogenic plants and plant-based compounds. The order does not change Massachusetts law or legalize commercial sales. It does not establish medical suitability, dosing guidance, product quality, or lawful commercial access.
The city action was checked against Cambridge’s official 2021 City Council index. Massachusetts statutes remain the controlling statewide sources.
Massachusetts classifies psilocybin and psilocyn as Class C controlled substances. Knowing possession remains unlawful unless authorized by law. Cambridge adopted Policy Order 13403 in 2021 in support of decriminalizing entheogenic plants and plant-based compounds. The order does not change Massachusetts law or legalize commercial sales.
No. The policy order did not create a licensed retail market, a state service program, or protection from state law.
Check the current Massachusetts statutes and Cambridge council records linked above. This page is a dated educational summary, not legal advice.
The product-site link does not change local or state law and should not be read as a statement of legal availability.