Psilocybin decriminalization in the United States

In the United States, psilocybin is classified as a Schedule I substance under the Controlled Substances Act, which prohibits its use, sale, and possession under federal law. Despite this, campaigns to decriminalize and legalize the medical use of psilocybin have succeeded in several jurisdictions since 2019.

Denver became the first city to decriminalize psilocybin in May 2019, followed by Oakland in June 2019, Santa Cruz, California in January 2020, and Washington, D.C. in November 2020. Oregon voters passed two ballot measures in 2020, making it the first state to legalize the supervised use of psilocybin and decriminalize possession of all drugs, including psilocybin. Colorado followed with a similar medical use and decriminalization measure in 2022. Since then, reforms have been enacted in more jurisdictions across the U.S.