In Colorado, cannabis has been legal for medical use since 2000 and for recreational use since late 2012. On November 7, 2000, 54% of Colorado voters approved Amendment 20, which amended the State Constitution to allow the use of marijuana in the state for approved patients with written medical consent. Under this law, patients may possess up to 2 ounces (57 g) of medical marijuana and may cultivate no more than six marijuana plants. Patients who were caught with more than this in their possession could argue "affirmative defense of medical necessity" but were not protected under state law with the rights of those who stayed within the guidelines set forth by the state. The Colorado Amendment 64, which was passed by voters on November 6, 2012, led to recreational legalization in December 2012 and state-licensed retail sales in January 2014. The policy has led to cannabis tourism. There are two sets of policies in Colorado relating to cannabis use: those for medicinal cannabis and for recreational drug use along with a third set of rules governing hemp.
In the United States, cannabis is legal in 38 of 50 states for medical use and 24 states for recreational use. At the federal level, cannabis is classified as a Schedule I drug under the Controlled Substances Act, determined to have a high potential for abuse and no accepted medical use, prohibiting its use for any purpose. Despite this prohibition, federal law is generally not enforced against the possession, cultivation, or intrastate distribution of cannabis in states where such activity has been legalized. Beginning in 2024, the Drug Enforcement Administration has initiated a review to potentially move cannabis to the less-restrictive Schedule III.
The legal history of cannabis in the United States began with state-level prohibition in the early 20th century, with the first major federal limitations occurring in 1937. Starting with Oregon in 1973, individual states began to liberalize cannabis laws through decriminalization. In 1996, California became the first state to legalize medical cannabis, sparking a trend that spread to a majority of states by 2016. In 2012, Washington and Colorado became the first states to legalize cannabis for recreational use.
Cannabis in Massachusetts is legal for medical and recreational use. It also relates to the legal and cultural events surrounding the use of cannabis. A century after becoming the first U.S. state to criminalize recreational cannabis, Massachusetts voters elected to legalize it in 2016.
Cannabis in Vermont as of May 2004 is legal for medical use, and legal for recreational use as of July 1, 2018.
Cannabis in Virginia is legal for medical use and recreational use. The first medical marijuana dispensary opened in August 2020, and adult recreational use became legalized in July 2021.
Cannabis in Pennsylvania is illegal for recreational use, but possession of small amounts is decriminalized in several of the state's largest cities. Medical use was legalized in 2016 through a bill passed by the state legislature.
Cannabis in New York has been legal for medical purposes under New York law since 2016, and recreational purposes since 2021. As of 2022, recreational cannabis is for sale legally in the state, only through state-approved dispensaries.
Cannabis is legal in Illinois for both medical and recreational use. Illinois became the eleventh state in the US to legalize recreational marijuana effective January 1, 2020.
Cannabis in New Mexico is legal for recreational use as of June 29, 2021. A bill to legalize recreational use – House Bill 2, the Cannabis Regulation Act – was signed by Governor Michelle Lujan Grisham on April 12, 2021. The first licensed sales of recreational cannabis began on April 1, 2022.
Cannabis in New Jersey is legal for both medical use and recreational use. An amendment to the state constitution legalizing cannabis became effective on January 1, 2021, and enabling legislation and related bills were signed into law by governor Phil Murphy on February 22, 2021.
Cannabis in Delaware is legal for medicinal and recreational use.
Cannabis in Michigan is legal for recreational use. A 2018 initiative to legalize recreational use passed with 56% of the vote. State-licensed sales of recreational cannabis began in December 2019.
The Cannabis Law legalizes recreational cannabis in New York. It is chapter 7-A of the Consolidated Laws of New York, and was originally enacted by the Marihuana Regulation and Taxation Act on March 31, 2021 but has since been amended.
The 203rd New York State Legislature, consisting of the New York State Senate and the New York State Assembly, met from January 9, 2019, to December 31, 2020, during the ninth and tenth years of Andrew Cuomo's governorship, in Albany.
The Cannabis Regulation and Taxation Act was a bill under consideration by the New York State Legislature during the 2020–2021 session to legalize cannabis. It was contained in Part H of the revenue bills embodying Governor Andrew Cuomo's budget proposal, A3009 and S2509.
