Yes. Under Massachusetts marijuana laws, adults 21 and older can legally possess up to 2 ounces of marijuana in public, keep up to 10 ounces at home, and grow 6 plants per person (12 per household). The 2-ounce public limit took effect on April 19, 2026, when Chapter 65 of the Acts of 2026 doubled the old 1-ounce cap. Retail purchases carry a 10.75% state excise tax, the 6.25% sales tax and up to 3% local tax, and using marijuana in public is a civil offense.
Massachusetts voters legalized adult-use marijuana in 2016, and in April 2026 the Legislature passed its biggest rewrite of the law since then, raising possession limits and restructuring the Cannabis Control Commission. This guide covers what the law says as of October 2026, with links to the Massachusetts General Laws behind each rule. It is general information, not legal advice.
Massachusetts Cannabis Laws at a Glance
| Topic | The rule in Massachusetts | Source |
|---|---|---|
| Legal status | Legal for adults 21+ and for registered medical patients | M.G.L. c. 94G; c. 94I |
| Legal age | 21+ for adult use | M.G.L. c. 94G §7 |
| Possession outside the home | 2 oz of marijuana, or the equivalent in products as set by the commission (since April 19, 2026) | c. 94G §7(a)(1) |
| Possession at home | Up to 10 oz, plus everything grown on the premises; more than 2 oz must be locked up | c. 94G §7(a)(2); §13(b) |
| Home grow | 6 plants per adult, 12 per residence | c. 94G §7(a)(2) |
| Where to buy | Retailers licensed by the Cannabis Control Commission | CCC |
| Public use | Civil penalty up to $100 | c. 94G §13(c) |
| Open container in a vehicle | Civil penalty up to $500 | c. 94G §13(d) |
| Driving | Operating under the influence of marijuana is OUI | c. 90 §24 |
| Taxes | 10.75% state excise + 6.25% sales tax + up to 3% local option tax | c. 64N §2, §3 |
| Regulator | Massachusetts Cannabis Control Commission (CCC), 3 governor-appointed commissioners since 2026 | M.G.L. c. 6 §223 |
Is Marijuana Legal in Massachusetts?
Yes, for adults 21 and older. Voters approved adult-use legalization by ballot question in November 2016, enacted as Chapter 334 of the Acts of 2016 and rewritten by the Legislature in Chapter 55 of the Acts of 2017. The law, now Chapter 94G of the General Laws, is enforced by the Cannabis Control Commission (CCC), which also runs the medical program under Chapter 94I.
On April 19, 2026, Governor Healey signed Chapter 65 of the Acts of 2026, “An Act modernizing the Commonwealth’s cannabis laws.” Passed as an emergency law, it took effect immediately.
Selling without a license, using in public and driving impaired remain illegal, and adult-use marijuana is still illegal under federal law, which matters at Logan Airport, on federal land and at the state line. See our guide to federal marijuana law in 2026.
How Much Marijuana Can You Possess in Massachusetts
Under M.G.L. c. 94G §7, as amended in 2026, an adult 21 or older may:
- Possess, use or buy up to 2 ounces of marijuana, or the equivalent amount of marijuana products as determined by the commission. Before April 19, 2026, the limit was 1 ounce, with no more than 5 grams as concentrate.
- Keep up to 10 ounces at home, plus all marijuana produced by plants grown on the premises.
- Give away up to 2 ounces to another adult 21 or older for free, as long as the gift is not advertised or promoted to the public.
The 2026 law tells the CCC to update its regulations within one year, including how many grams of concentrate or milligrams of edibles count as the “equivalent” of 2 ounces. Until those rules are final, check the CCC’s guidance before buying a large mix of products.
Penalties for going over: under c. 94G §13, an adult carrying more than 2 but not more than 3 ounces outside the home faces only a civil penalty of up to $100 and forfeiture. Keeping more than 2 ounces at home without a lock is also a civil penalty of up to $100.
Under 21: under c. 94C §32L, possessing 3 ounces or less is a civil offense. For an offender 18 to 21, the penalty is $100 and forfeiture. Offenders under 18 must also complete a drug awareness program and community service, or the penalty can rise to $1,000.
Where You Can Use Marijuana in Massachusetts
Use marijuana on private property where the owner allows it. Under c. 94G §13(c), consuming marijuana in a public place, or smoking it anywhere tobacco smoking is banned, carries a civil penalty of up to $100. The statute exempts designated consumption areas at licensed businesses in cities and towns that have voted to allow on-site consumption.
Chapter 65 of 2026 also confirmed the CCC’s power to create licenses for consumption where marijuana is sold and at limited special events. As of October 2026 we could not confirm that any such business is open, so do not plan a trip around one.
In vehicles, c. 94G §13(d) bans an open container of marijuana in the passenger area on any public way, with a civil penalty of up to $500. A package counts as open if its seal is broken or some of the contents are gone. The trunk and a locked glove compartment are not the passenger area.
Buying Marijuana in Massachusetts: Stores, ID and Tourists
- Who can buy: Any adult 21 or older with valid government photo ID can buy from a licensed retailer. Chapter 94G does not require Massachusetts residency, so visitors can shop under the same limits.
- Licensed stores only: The CCC publishes the list of licensed retailers. Cities and towns can limit or ban adult-use businesses, so not every community has a store.
- More stores per owner: Chapter 65 raised the cap on retail licenses a single company may hold from 3 to 6. Companies that are not social equity businesses may not get more than 5 for the first 12 months after the CCC starts accepting applications under the new rule.
Medical Marijuana in Massachusetts
The CCC runs the medical program under M.G.L. c. 94I §2. A qualifying patient with a debilitating medical condition needs a written or electronic certification from a healthcare professional with a bona fide professional-patient relationship. The commission then issues a registration card. Under the 2026 amendments, a temporary registration is generated automatically when the CCC receives the provider’s electronic certification and serves as a card until the permanent card arrives, for up to 14 days after it is issued.
Medical patients buy from licensed medical marijuana establishments. The 10.75% excise tax in Chapter 64N applies to sales by adult-use marijuana retailers. The 2026 law renamed “medical marijuana treatment centers” as “medical marijuana establishments” and lets the CCC create new medical license types.
Growing Marijuana at Home in Massachusetts
Adults 21 and older may grow up to 6 plants for personal use at their primary residence, with no more than 12 plants on the premises at once, under c. 94G §7(a)(2). Under c. 94G §13:
- plants must not be visible from a public place without binoculars, aircraft or other optical aids, and must be grown in an area with a lock or other security device, or you face a civil penalty of up to $300 and forfeiture;
- growing more than 6 but not more than 12 plants is a civil penalty of up to $100 and forfeiture of the extra plants.
Driving and Marijuana in Massachusetts
Operating a motor vehicle while under the influence of marijuana is OUI under M.G.L. c. 90 §24, the same statute that covers drunk driving. The statute’s numeric 0.08 limit applies to alcohol only, so marijuana cases depend on evidence of impairment. Chapter 65 of 2026 directs the CCC to study the science of measuring marijuana impairment in drivers.
Taking Marijuana Across Massachusetts Borders, Airports and Federal Land
- Neighboring states: Carrying marijuana across any state line is illegal under federal law, even into legal states. New Hampshire, the main exception in New England, has not legalized adult use, so a short drive from Lowell or Haverhill puts you under very different rules. See our New Hampshire guide.
- Flying: The TSA follows federal law and refers marijuana found at screening to police. Carrying marijuana on a flight from Logan or any airport is illegal under federal law.
- Federal property: National parks, military bases and federal buildings follow federal law, where adult-use marijuana is still a Schedule I drug.
Massachusetts Marijuana Taxes in 2026
Adult-use purchases from a retailer carry three taxes:
- a 10.75% state marijuana excise under c. 64N §2,
- the 6.25% state sales tax under c. 64H §2, and
- a local option tax of up to 3% in cities and towns that adopt it, under c. 64N §3.
That totals up to 20% at the register. Chapter 65 of 2026 did not change the rates, but it ordered the CCC to study how the current excise affects business closures and the illicit market.
What Changed in Massachusetts Marijuana Law Recently
- Possession limits doubled (April 19, 2026): 2 ounces in public, with civil penalties only up to 3 ounces, under Chapter 65 of the Acts of 2026.
- New Cannabis Control Commission (2026): the act kept the Cannabis Control Commission as an independent agency but cut it from five commissioners to three, all appointed by the governor, with the chair serving a term matching the governor’s, under new M.G.L. c. 6 §223.
- Retail license cap raised: from 3 to 6 retail licenses per company, with a temporary 5-store limit for companies that are not social equity businesses.
- Hemp-derived THC: the act directs the CCC, with public health, agriculture and revenue officials, to study and recommend rules for the hemp-derived cannabinoid market. Federally, synthesized cannabinoids such as delta-8 made from CBD lose hemp status on November 12, 2026, and a 0.4 mg total THC per container cap applies to naturally occurring cannabinoids from December 11, 2026.
- Repeal petition (2026): an initiative petition, H.5002, “An Act to restore a sensible marijuana policy”, would repeal Chapters 94G and 64N, ending licensed adult-use sales and their taxes while keeping the medical program and the legality of possessing 1 ounce or less. The Legislature took no action on it, proponents gathered the additional signatures, and it appears on the November 3, 2026 ballot as Question 8. If voters approve it, adult-use retail sales would end starting in 2028; medical sales and adult possession would remain legal.
- Federal rescheduling (April 2026): marijuana held under a state medical marijuana license, and FDA-approved marijuana products, moved to Schedule III. Adult-use marijuana remains Schedule I. See our federal law guide.
From the editor, James Buddsey: Massachusetts finally fixed one of the oddest gaps in its law: you could keep 10 ounces at home but carry only 1. The new 2-ounce limit is simpler. What has not changed is the open container rule. Keep sealed packages in the trunk, because $500 is a steep fine for a rolled-down window and a broken seal.
Massachusetts Marijuana Laws FAQ
Is weed legal in Massachusetts?
Yes. Adults 21 and older may possess up to 2 ounces outside the home and up to 10 ounces at home, and may buy from CCC-licensed retailers, under M.G.L. c. 94G §7.
How much weed can you carry in Massachusetts in 2026?
Up to 2 ounces, or the equivalent in marijuana products as set by the CCC, since April 19, 2026. Carrying more than 2 and up to 3 ounces is a civil penalty of up to $100.
Can tourists buy weed in Massachusetts?
Yes. Any adult 21 or older with valid government photo ID can buy at a licensed retailer. Taking it out of the state, including by plane, is illegal under federal law.
Can you grow weed in Massachusetts?
Yes. Adults may grow 6 plants each, with a maximum of 12 per residence. Plants must be out of public view and in a locked area.
Can you smoke weed in public in Massachusetts?
No. Consuming marijuana in public, or smoking it where tobacco smoking is banned, carries a civil penalty of up to $100 under c. 94G §13(c).
What is the penalty for an open container in the car?
A civil penalty of up to $500 under c. 94G §13(d). A package with a broken seal must be in the trunk or a locked glove compartment.
What are the marijuana taxes in Massachusetts?
A 10.75% state excise, the 6.25% sales tax and up to 3% local tax, for a maximum of 20% on adult-use purchases.
Is Massachusetts repealing legal weed?
Not yet. Question 8 on the November 3, 2026 ballot would end adult-use retail sales starting in 2028 while keeping medical cannabis and adult possession legal. Until then, adult-use stores remain open under Chapter 94G. We will update this guide after the election.
More State and Federal Cannabis Law Guides
Compare Massachusetts with every other state in our state cannabis law guides, or read our explainer on federal marijuana law in 2026. Nearby, see the guides for New Hampshire, Vermont, Maine, Rhode Island, Connecticut and New York.
Neighboring state guides: New Hampshire · Vermont · New York · Connecticut · Rhode Island · All state cannabis laws
General information about Massachusetts cannabis law as of October 2026, not legal advice.