Marijuana laws by state
October 2020
| State | Type of law | Age restrictions | Possession limits | Retail recreational sales allowed |
|---|---|---|---|---|
| Alabama | limited medical; effective July 1, 2014 | none | specified cannabis product that contains no more than 3 percent THC | |
| Alaska | medical; effective June 1, 1999 | none | no more than 1 ounce | |
| recreational; effective February 24, 2015 | if under age 21, not allowed to purchase, possess, or use | no more than 1 ounce | October 2016 | |
| Arizona | medical | none | no more than 2.5 ounces | |
| Arkansas | medical; effective November 9, 2016 | if under age 21, cannot smoke medical marijuana | no more than 2.5 ounces | |
| California | medical; effective November 6, 1996 | none | no more than 8 ounces unless a greater amount is deemed medically necessary | |
| recreational; effective November 9, 2016 | if under age 21, not allowed to purchase, possess, or use | no more than 28.5 grams of cannabis not in the form of concentrated cannabis and no more than 8 grams of concentrated cannabis | January 1, 2018 | |
| Colorado | medical; effective June 1, 2001 | if under age 18, cannot smoke medical marijuana when on school grounds, on a school bus, or at a school-sponsored event | no more than 2 ounces unless a greater amount is deemed medically necessary | |
| recreational; effective December 10, 2012 | if under age 21, not allowed to purchase, possess, or use | no more than 1 ounce | January 1, 2014 | |
| Connecticut | medical; effective October 1, 2012 | if under age 21, cannot smoke medical marijuana | not to exceed an amount reasonably necessary to ensure the uninterrupted availability for 1 month | |
| Delaware | medical; effective July 1, 2011 | if under age 18, may use only medical marijuana oil and only for certain debilitating conditions and symptoms | no more than 6 ounces | |
| District of Columbia | medical; effective in 2009 | none | no more than 4 ounces | |
| recreational; effective February 26, 2015 | if under age 21, not allowed to purchase, possess, or use | no more than 2 ounces | not allowed | |
| Florida | medical; effective March 25, 2016 | none | 70-day supply or 4 ounces in a form for smoking unless a greater amount is deemed medically necessary | |
| Georgia | limited medical; April 16, 2015 | none | no more than 20 fluid ounces of specified cannabis product that contains no more than 5 percent THC | |
| Hawaii | medical; effective June 14, 2000 | none | no more than 4 ounces | |
| Idaho | no law | n/a | n/a | |
| Illinois | medical; effective January 1, 2014 | if under age 18, may have ID card only for seizures or as provided by administrative rule; if under age 21, may use only medical cannabis-infused products | no more than 2.5 ounces unless a greater amount is deemed medically necessary; for registered qualifying patients who are at least 21 years old, 5 plants that are more than 5 inches tall and any cannabis produced by those plants so long as any amount in excess of 30 grams of raw cannabis is secure within the residence | |
| recreational; effective January 1, 2020 | if under age 21, not allowed to purchase, possess, or use | no more than 30 ounces of cannabis flower, 500 milligrams of THC contained in cannabis-infused product, and 5 grams of cannabis concentration | January 1, 2020 | |
| Indiana | limited medical; April 26, 2017 | none | specified cannabis product that contains no more than 0.3 percent THC | |
| Iowa | limited medical; effective July 1, 2014 | none | no more than 4.5 grams in a 90-day period unless a greater amount is deemed medically necessary | |
| Kansas | limited medical; effective July 1, 2019 | none | specified cannabis product that contains no more than 5 percent THC relative to the cannabidiol concentration in the preparation | |
| Kentucky | limited medical; effective April 10, 2014 | none | specified cannabis product obtained pursuant to a written order of a physician practicing at a hospital or associated clinic affiliated with a Kentucky public university having a college or school of medicine, derived from industrial hemp, or approved as a prescription by the FDA | |
| Louisiana | limited medical | none | 1 month supply; one dose shall contain no more than 10 milligrams of THC | |
| Maine | medical; December 22, 1999 | none | up to 2.5 ounces | |
| recreational; effective January 30, 2017 | if under age 21, not allowed to purchase, possess, or use | up to 2.5 ounces | expected in March 2020 | |
| Maryland | medical; effective June 1, 2011 | none | no more than 30-day supply unless a greater amount is deemed medically necessary | |
| Massachusetts | medical; effective January 1, 2013 | none | no more than 60-day supply, up to 10 ounces or as determined by the cannabis control commission | |
| recreational; effective December 15, 2016 | if under age 21, not allowed to purchase, possess, or use | no more than 1 ounce; within the person's primary residence, no more than 10 ounces | November 20, 2018 | |
| Michigan | medical; effective December 4, 2008 | none | no more than 2.5 ounces | |
| recreational; effective December 6, 2018 | if under age 21, not allowed to purchase, possess, or use | no more than 2.5 ounces; within the person's residence, no more than 10 ounces | December 1, 2019 | |
| Minnesota | medical; effective May 30, 2014 | none | no more than 30-day supply | |
| Mississippi | limited medical; effective April 17, 2014 | none | specified cannabis product provided by the National Center for Natural Products Research at the University of Mississippi and dispensed by the Department of Pharmacy Services at the University of Mississippi Medical Center | |
| Missouri | medical; effective December 6, 2018 | if under age 18 and not emancipated, may not have an ID card, purchase, or possess marijuana | purchase no more than 30-day supply, which can be limited to no less than 4 ounces of dried, unprocessed marijuana, unless a greater amount is deemed medically necessary; possess at least 60-day supply, although qualifying patients who can cultivate marijuana may possess up to 90-day supply | |
| Montana | medical; effective November 2, 2004 | if under age 18, cannot smoke medical marijuana and can only used marijuana-infused products | up to 1 ounce | |
| Nebraska | no law | n/a | n/a | |
| Nevada | medical; effective by late November or early December 2000 | none | no more than 2.5 ounces in any 14-day period unless a greater amount is deemed medically necessary | |
| recreational; effective January 1, 2017 | if under age 21, not allowed to purchase, possess, or use | no more than 1 ounce | July 1, 2017 | |
| New Hampshire | medical; effective July 23, 2013 | none | no more than 2 ounces | |
| New Jersey | medical; effective October 1, 2010 | none | no more than 3 ounces in a 30-day period unless a greater amount is deemed medically necessary | |
| New Mexico | medical; effective July 1, 2007 | none | 3-month supply | |
| New York | medical; effective July 5, 2014 | none | no more than 30-day supply; individual dose may not contain more than 10 milligrams of THC | |
| North Carolina | limited medical; effective July 13, 2014 | none | specified cannabis product that contains no more than 0.9 percent THC | |
| North Dakota | medical; effective April 17, 2017 | if under age 19, may use only "pediatric medical marijuana", which contains no more than 6 percent THC | no more than 3 ounces unless an amount up to 7.5 ounces is deemed medically necessary | |
| Ohio | medical; effective September 8, 2016 | none | no more than 90-day supply | |
| Oklahoma | medical; effective July 26, 2018 | none | no more than 72 ounces of edible marijuana, 3 ounces of marijuana on the person, 8 ounces of marijuana in the residence, and 1 ounce of concentrated marijuana | |
| Oregon | medical; effective December 3, 1998 | if under age 18, cannot produce medical marijuana | no more than 24 ounces | |
| recreational; effective December 4, 2014 | if under age 21, not allowed to purchase, possess, or use | no more than 8 ounces of usable marijuana, 16 ounces of cannabinoid products in solid form, 72 ounces of cannabiniod products in liquid form, and 16 ounces of cannabinoid concentrates | October 1, 2015 | |
| Pennsylvania | medical; effective May 17, 2016 | none | no more than 30-day supply | |
| Rhode Island | medical; effective July 1, 2006 | none | no more than 2.5 ounces and an amount of wet marijuana as determined by the departments of health and business regulation | |
| South Carolina | limited medical; effective June 2, 2014 | none | specified cannabis product that contains no more than 0.9 percent THC | |
| South Dakota | no law | n/a | n/a | |
| Tennessee | limited medical; effective May 16, 2014 | none | specified cannabis product that contains less than 0.9 percent THC | |
| Texas | limited medical; effective June 1, 2015 | none | specified cannabis product that contains no more than 0.5 percent THC | |
| Utah | medical; effective May 8, 2018Footnote 1 | if under age 18, may only qualify for a provisional patient card | legal dosage limit sufficient to provide 30 days of treatment and may not exceed 113 grams of unprocessed marijuana or an amount of cannabis product that contains no more than 20 grams of total composite THC | |
| Vermont | medical; effective July 1, 2004 | none | no more than 2 ounces | |
| recreational; effective July 1, 2018 | if under age 21, not allowed to purchase, possess, or use | no more than 1 ounce | not allowed | |
| Virginia | limited medical; effective February 26, 2015 | none | specified cannabis product that contains no more than 5 percent THC | |
| Washington | medical; December 3, 1998 | if under age 18, may not grow marijuana plants or purchase marijuana-infused products, useable marijuana, or marijuana concentrates from a marijuana retailer | no more than 48 ounces of marijuana-infused product in solid form, 3 ounces of useable marijuana, 216 ounces of marijuana-infused product in liquid form, or 21 grams of marijuana concentrates unless a greater amount is deemed medically necessary, | |
| recreational; effective December 6, 2012 | if under age 21, not allowed to purchase, possess, or use | no more than 1 ounce of useable marijuana, 16 ounces of marijuana-infused product in solid form; 72 ounces of marijuana-infused product in liquid form, and 7 grams of marijuana concentrate | July 8, 2014 | |
| West Virginia | medical; effective July 1, 2019 | none | no more than 30-day supply | |
| Wisconsin | limited medical; effective April 17, 2014 | none | specified cannabis product in a form without a psychoactive effect | |
| Wyoming | limited medical; effective July 1, 2015 | none | specified cannabis product that contains less than 0.3 percent THC |