In the United States, the non-medical use of cannabis is legalized in 24 states and decriminalized in 7 states, as of November 2023. Decriminalization refers to a policy of reduced penalties for cannabis offenses, typically involving a civil penalty for possessing small amounts, instead of criminal prosecution or the threat of arrest. In jurisdictions without penalty the policy is referred to as legalization, although the term decriminalization is sometimes used for this purpose as well.
In the United States, increased restrictions and labeling of cannabis as a poison began in many states from 1906 onward, and outright prohibitions began in the 1920s. By the mid-1930s cannabis was regulated as a drug in every state, including 35 states that adopted the Uniform State Narcotic Drug Act. The first national regulation was the Marihuana Tax Act of 1937.
Ravin v. State, 537 P.2d 494, was a unanimous decision by the Alaska Supreme Court. Decided on May 27, 1975, the Court held that the Alaska Constitution's right to privacy protects an adult's ability to use and possess a small amount of marijuana in the home for personal use. The Alaska Supreme Court thereby became the first—and only—state or federal court to announce a constitutional privacy right that protects some level of marijuana use and possession.
Cannabis in Oregon is legal for both medical and recreational use. In recent decades, the U.S. state of Oregon has had a number of legislative, legal, and cultural events surrounding use of cannabis. Oregon was the first state to decriminalize the possession of small amounts of cannabis, and among the first to authorize its use for medical purposes. An attempt to recriminalize possession of small amounts of cannabis was turned down by Oregon voters in 1997.
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 Maine is legal for recreational use. It was originally prohibited in 1913. Possession of small amounts of the drug was decriminalized in 1976 under state legislation passed the previous year. The state's first medical cannabis law was passed in 1999, allowing patients to grow their own plants. The cities of Portland and South Portland decriminalized the possession and recreational use of marijuana in 2013 and 2014, respectively.
Alaska Measure 2 was a successful 2014 ballot measure in the U.S. state of Alaska, described as "An Act to tax and regulate the production, sale, and use of marijuana". The measure went into effect on 24 February 2015, allowing Alaskans age 21 and older to possess up to an ounce of cannabis and six plants, making Alaska the third state to legalize recreational marijuana, following Colorado and Washington. Oregon and Alaska both voted in legalization on Election Day 2014, but Alaska preceded Oregon in enacting their legislation.
Alaska Measure 2 or the Alaska Marijuana Criminalization Initiative was a successful 1990 ballot measure in the U.S. state of Alaska; the initiative stated that it: "would change Alaska's laws by making all such possession of marijuana criminal, with possible penalties of up to 90 days in jail and/or up to a $1000 fine."
Cannabis in South Dakota is legal for medical use as of July 1, 2021, having been legalized by a ballot initiative on November 3, 2020. Prior to then, cannabis was fully illegal, with South Dakota being the only U.S. state which outlawed ingestion of controlled substances. Testing positive for cannabis can be a misdemeanor offense. South Dakota would have become the first state in US history to legalize recreational and medical cannabis simultaneously, but an amendment legalizing recreational marijuana that was approved in the same election was struck down as unconstitutional the following February. The challenge claimed the amendment violated Amendment Z, the "Single-Subject Rule". The decision was appealed to the South Dakota Supreme Court, which upheld the lower court's decision on November 24, 2021.
Cannabis in Montana has been legal for both medical and recreational use since January 1, 2021, when Initiative 190 went into effect. Prior to the November 2020 initiative, marijuana was illegal for recreational use starting in 1929. Medical cannabis was legalized by ballot initiative in 2004. The Montana Legislature passed a repeal to tighten Montana Medical Marijuana (MMJ) laws which were never approved by the governor. However, with the new provisions, providers could not service more than three patients. In November 2016 Bill I-182 was passed, revising the 2004 law and allowing providers to service more than three patients. In May 2023, numerous further bills on cannabis legalization and other related purposes passed the Montana Legislature. The Governor of Montana is yet to either sign or veto the bill.
Cannabis in Arkansas is illegal for recreational use. First-time possession of up to four ounces (110 g) is punished with a fine of up to $2,500, imprisonment of up to a year, and a mandatory six month driver's license suspension. Medical use was legalized in 2016 by way of a ballot measure to amend the state constitution.
Cannabis in North Dakota is legal for medical use but illegal for recreational use. Since 2019 however, possession under a 1/2 ounce has been decriminalized in the sense that there is no threat of jail time, though a criminal infraction fine up to $1,000 still applies. The cultivation of hemp is currently legal in North Dakota. In November 2018, the state's voters voted on recreational marijuana legalization, along with Michigan; the measure was rejected 59% to 41%. Two groups attempted to put marijuana legalization measures on the June 2020 Primary and the November 2020 elections, but were prevented from doing so by the COVID-19 pandemic.
Noy v. State is a case decided by the Alaska Court of Appeals in 2003. David S. Noy was convicted of possessing less than eight ounces of marijuana by a jury. However, in 1975, the Alaska Supreme Court ruled in Ravin v. State that possessing less than four ounces of marijuana in one's home is protected by the Alaska Constitution's privacy clause. The amount possessed being over four ounces was highly in question on appeal. Thus, the Alaska Court of Appeals overturned Noy's conviction and struck down the part of the law criminalizing possession of less than four ounces of marijuana.
The Adult Use of Marijuana Act (AUMA) was a 2016 voter initiative to legalize cannabis in California. The full name is the Control, Regulate and Tax Adult Use of Marijuana Act. The initiative passed with 57% voter approval and became law on November 9, 2016, leading to recreational cannabis sales in California by January 2018.
Cannabis in Arizona is legal for recreational use. A 2020 initiative to legalize recreational use passed with 60% of the vote. Possession and cultivation of recreational cannabis became legal on November 30, 2020, with the first state-licensed sales occurring on January 22, 2021.
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 Maryland is legal for medical use and recreational use. Possession of up to 1.5 ounces and cultivation of up to 2 plants is legal for adults 21 years of age and older. In 2013, a state law was enacted to establish a state-regulated medical cannabis program. The program, known as the Natalie M. LaPrade Maryland Medical Cannabis Commission (MMCC) became operational on December 1, 2017.
Cannabis in Ohio is legal for recreational use. Issue 2, a ballot measure to legalize recreational use, passed by a 57–43 margin on November 7, 2023. Possession and personal cultivation of cannabis became legal on December 7, 2023, with the first licensed sales yet to occur under the law. Prior to legalization, Ohio decriminalized possession of up 100 grams in 1975, with several of the state's major cities later enacting further reforms.
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 Michigan Regulation and Taxation of Marihuana Act, also known as Proposal 1, was an initiative that appeared on the November 2018 ballot to legalize cannabis in the U.S. state of Michigan. The initiative allows adults 21 and older to possess up to 2.5 ounces (71 g) of cannabis and to grow up to 12 plants at home. The initiative was approved with 56% of the vote.
