Massachusetts

Overview

Massachusetts legalized adult-use cannabis by ballot in 2016, and sales began in 2018. Adults 21+ may carry up to one ounce in public, keep up to ten ounces at home, and grow up to six plants per person, with a cap of 12 per household. The Cannabis Control Commission licenses retailers and runs the medical program. Local communities may limit or ban retail businesses.

Last reviewed October 2026. General information, not legal advice.

What's Legal

Public consumption is prohibited; licensed social consumption sites are permitted in some municipalities.

Possession Limits

1 oz in public; up to 10 oz at home

Home Growing

Up to 6 plants per person, 12 per household

Recent Changes

Question 8 is on the November 3, 2026 ballot. It would repeal legal adult-use retail sales starting January 1, 2028, keep medical marijuana, and change possession penalties. If it fails, current law stays in place. Check the Secretary of the Commonwealth for official ballot information.

Driving and Cannabis

Driving while impaired by cannabis is illegal in Massachusetts, as it is in every state, whether or not the cannabis was obtained legally. Officers may rely on field sobriety tests, drug recognition evaluations, and blood tests, and some states set specific THC limits or zero-tolerance rules. Consuming cannabis in a vehicle and carrying open or unsealed packages where the driver can reach them are commonly prohibited. If you have used cannabis, the safest choice is not to drive.

Crossing State Lines and Federal Law

Taking marijuana across state lines is illegal under federal law, even between two states where cannabis is legal, and it may also violate the law of the state you enter. Marijuana is also prohibited on federal land, in national parks, and at airports under TSA jurisdiction. In 2026 the federal government moved FDA-approved products and state-licensed medical marijuana to Schedule III, but adult-use marijuana remains a Schedule I substance, and rescheduling does not legalize interstate transport. Separate federal changes to the legal definition of hemp take effect in late 2026 and will restrict many intoxicating hemp-derived THC products.

Massachusetts Cannabis FAQ

Compare Massachusetts with every other state in our cannabis laws comparison table.

Official Resource

Cannabis laws change often, and limits, penalties, and program rules can differ from what is summarized here. This page is general information, not legal advice. Before you rely on any detail, check the official state source below or consult a licensed attorney in Massachusetts.