The legalization of medical cannabis is in full swing in no less than 23 states and in Washington D.C., and many more are set to implement their own medical marijuana laws in the near future. The specifics of medical cannabis regulation differ from state to state, with California having been the first to allow the use of marijuana for medical purposes.

Here’s a breakdown of the (current) states with medical cannabis.

states with medical cannabis

Alaska
Alaska legalized medical marijuana in 1998 by way of Ballot Measure 8, which was passed on the strength of a 58% vote. Medical users in the state are legally allowed to possess an ounce of usable product, and to cultivate 3 mature and 3 immature plants.

Arizona
Arizona legalized medical cannabinoids in 2010 by way of Proposition 203, which was passed via a 50.13% vote. Medical users in the state can possess 2.5 ounces of usable product, and grow as many as 12 plants.

California
California passed medical marijuana legislation in 1996 by way of Proposition 215, which was passed on a 56% vote. Medical marijuana users in California can possess up to 8 ounces legally, and grow 6 mature or 12 immature plants.

Colorado
Colorado passed medical marijuana legalization in 2000 with Ballot Amendment 20, passed on a 54% vote. Medical marijuana users can possess 2 ounces of usable material, and grow 3 mature and 3 immature plants.

Connecticut
Medical marijuana was legalized in 2012 in Connecticut, by way of House Bill 5389. The law was passed on the strength of a 96 to 51 vote in the House, and a 21 to 13 vote in the Senate. The exact amount medical marijuana patients are legally allowed to possess has yet to be determined, but users are allowed to possess a one-month supply.

DC
In Washington DC, medical marijuana was legalized in 2010 on the strength of Amendment Act B18-622, voted into effect on a 13 to 0 vote. Medical marijuana users are allowed 2 ounces of dried product, with the limit for other forms of marijuana to be determined at a future date.

Delaware
Delaware legalized marijuana for medical use in 2011, by way of Senate Bill 17. Passed on the strength of a 27 to 14 House vote, and a 17 to 4 Senate vote, the bill allowed the possession of up to 6 ounces of usable product.

Hawaii
Hawaii legalized medical marijuana in 2000, by way of Senate Bill 862. The bill was passed on a 32 to 18 House vote, and a 13 to 12 Senate vote. Medical marijuana users in the state can possess 3 ounces of usable product legally, and grow 3 mature and 4 immature plants.

Illinois
Medical marijuana was legalized in Illinois in 2013. Passed on the strength of House Bill 1, voted into effect by a 61 to 57 House vote and a 35 to 21 Senate vote, the law allowed the possession of 2.5 ounces of usable product for up to 14 days.

Maine
Maine passed its own medical marijuana legalization law in 1999 by way of Ballot Question 2, which was voted in by 61% of respondents. Medical marijuana users in the state can possess 2.5 ounces of usable product and grow 6 plants.

Maryland
Maryland voted to legalize medical marijuana in 2014, by way of House Bill 881. Medical marijuana users in the state can possess a 30-day supply legally, with the exact amount to be determined.

Massachusetts
Massachusetts voters passed the state medical marijuana law in 2012 with Ballot Question 3. Medical marijuana users in the state can possess a 60-day supply legally.

Michigan
Michigan passed medical marijuana legalization in 2008 with Proposal 1, voted into effect by 63% of respondents. Medical marijuana users can possess 2.5 ounces of product, and grow 12 plants.

Minnesota
Minnesota passed medical marijuana legalization in 2014 by way of Senate Bill 2470. Medical marijuana users in the state can legally possess a 30-day supply of marijuana in non-smokable form.

Montana
Montana passed medical marijuana legalization in 2004 with Initiative 148, voted into effect by 62% of respondents. Users can possess 1 ounce of usable product for medical purposes, and grow 4 mature plants and 12 seedlings.

Nevada
Nevada passed medical marijuana legalization in 2000 with Ballot Question 9. Passed on a 65% vote, the law allowed medical marijuana users to possess 1 ounce of usable product, and to grow 3 mature and 4 immature plants.

New Hampshire
New Hampshire passed medical marijuana legalization in 2013 with House Bill 573. Medical marijuana users in the state can legally possess as much as 2 ounces of useable product for a period of 10 days.

New Jersey
New Jersey passed its medical marijuana law in 2010, by way of Senate Bill 119. Medical marijuana users in the state can possess as much as 2 ounces of usable product.

New Mexico
New Mexico voted medical marijuana into legality in 2007, with Senate Bill 523. Medical marijuana users in the state can possess 6 ounces of usable product legally, and grow 4 mature and 12 immature plants.

New York
Medical marijuana was legalized in New York in 2014, by way of Assembly Bill 6357. Medical marijuana users in the state can possess a 30-day supply of marijuana in non-smokable form.

Oregon
Oregon passed medical marijuana legalization in 1998, with Ballot Measure 67. Medical marijuana users in the state can possess 24 ounces of usable product, and cultivate 6 mature and 18 immature plants.

Rhode Island
Rhode Island voted medical marijuana into legislation in 2006, with the passage of Senate Bill 0710. Medical marijuana users in the state can possess 2.5 ounces of usable product and grow 12 plants.

Vermont
Vermont passed medical marijuana legalization in 2004 with Senate Bill 76. Medical marijuana users in the state can possess 2 ounces of usable product and grow 2 mature and 7 immature plants.

Washington
Washington legalized medical marijuana in 1998 with Initiative 692. Medical marijuana users in the state can possess 24 ounces of usable product and grow 15 plants.

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