Colorado Marijuana Laws (2026): Possession, Limits and Where to Buy

By James Buddsey · Updated October 15, 2026

Yes. Under Colorado marijuana laws, adults 21 and older can legally possess up to 2 ounces of cannabis, buy up to 1 ounce per transaction from a licensed store, and grow up to six plants at home, with no more than 12 plants in any residence. Public use is a drug petty offense with a fine of up to $100, and recreational purchases carry a 15% state retail marijuana sales tax plus any local tax, as of October 2026.

Colorado voters legalized adult-use cannabis in November 2012 with Amendment 64. The rules are layered: state law, state regulations and local ordinances all apply, and cities can be stricter than the state. This guide explains what the law says as of October 2026, with links to the statutes and state agencies behind each rule. It is general information, not legal advice.

Colorado Cannabis Laws at a Glance

Is Marijuana Legal in Colorado?

Yes, for adults 21 and over. Voters approved medical marijuana in 2000 by adding Section 14 to Article XVIII of the state constitution, then approved adult use in November 2012 with Amendment 64, which became Section 16 of the same article.

The state’s summary of the law on cannabis.colorado.gov, lists the basics: you must be 21 to buy, have or use retail cannabis; it is a felony to give or sell cannabis to anyone under 21; and only licensed businesses may sell. Adults may give up to 2 ounces to another adult 21 or older, but may not sell, and that includes homegrown cannabis.

Adult-use cannabis remains illegal under federal law, which matters on federal land, at airports and at the state line. Our federal marijuana law guide covers the April 2026 rescheduling order and what it does and does not change.

How Much Cannabis Can You Possess and Buy in Colorado

• Possession: Adults 21 and older may have up to 2 ounces of cannabis. Lawmakers raised the limit from 1 ounce to 2 ounces in 2021, Westword reported.
• Purchase per transaction: A retail store may not sell more than 1 ounce of retail marijuana or its equivalent in products to one person in a single transaction under C.R.S. 44-10-601(3)(a). The edible equivalent is set by Marijuana Enforcement Division rule and is commonly applied as 800 milligrams of THC.
• Concentrate: A store may not sell more than 8 grams of concentrate to a person in a single day under C.R.S. 44-10-601(17).

Going over the possession limit is a crime. Under C.R.S. 18-18-406(4), possessing more than 2 ounces but not more than 6 ounces, or not more than 3 ounces of concentrate, is a level 2 drug misdemeanor. More than 6 ounces, or more than 3 ounces of concentrate, is a level 1 drug misdemeanor.

A 2025 bill, HB25-1209, originally would have doubled the per-transaction sales limit. That provision was removed before the bill passed, Westword reported, so the 1-ounce sales limit still applies.

Where You Can and Cannot Use Cannabis in Colorado

Openly and publicly displaying, consuming or using 2 ounces or less of cannabis is a drug petty offense under C.R.S. 18-18-406(5)(b)(I), punishable by a fine of up to $100 and up to 24 hours of community service. Public use of more than 2 ounces, or of any amount of concentrate, is treated as possession and charged under the misdemeanor tiers above.

Not allowed

• Sidewalks, parks, amusement parks, concert venues and ski resorts
• Restaurants, bars, cafes and other businesses, unless licensed as a hospitality business
• Common areas of apartment and condominium buildings
• Federal land, including national parks, national forests and ski slopes on Forest Service land
• Inside a vehicle, for drivers and passengers, even when parked

Allowed

• Private property with the owner’s permission. Landlords and hotels can ban use and possession, so check before you light up.
• Licensed marijuana hospitality businesses in towns that allow them. Consumption on licensed premises under C.R.S. 44-10-609 and 44-10-610 is not a public-use violation.

The list comes from the state’s consumer guidance.

Buying Cannabis in Colorado: Stores, Hours, ID and Delivery

• ID: Staff must verify a valid identification showing you are 21 or older before any sale under C.R.S. 44-10-601(3)(b). No one under 21 may enter the restricted area of a retail store. Out-of-state visitors 21 and older can buy.
• Hours: State rules allow retail stores to open between 8 a.m. and midnight. Cities and counties can require shorter hours.
• Local rules: Towns and counties can ban or restrict stores, so check local law.
• Delivery: Retail delivery is legal only with both a state delivery permit and local approval under C.R.S. 44-10-601(13). Deliveries go only to adults 21+ with ID, no more than once per day to the same person or residence.

Medical Marijuana in Colorado

The medical program is run by the Colorado Department of Public Health and Environment (CDPHE) Medical Marijuana Registry. Patients need a certification from a health care provider for a debilitating or disabling condition, then apply online. According to the registry FAQ:

• The application processing fee is $52, non-refundable, charged each time you apply.
• Provider certifications last a maximum of one year, so patients see a provider every year.

Applicants aged 18 to 20 who apply for the first time need certifications from two providers at different medical practices each year, and minors need two physician certifications, CDPHE says. A patient may generally possess 2 ounces of usable marijuana and up to six plants, three of them flowering, with higher amounts allowed where medically necessary, according to the legislature’s Office of Legislative Legal Services.

The main practical benefit is tax: medical purchases are not subject to the 15% retail marijuana sales tax or the 15% excise tax and pay the 2.9% state sales tax instead.

Growing Cannabis at Home in Colorado

Colorado residents 21 and older may grow cannabis at home for personal use. State guidance sets out the core rules:

• Up to six plants per adult, with no more than three flowering at one time.
• No more than 12 plants in a residence, no matter how many adults live there, under C.R.S. 18-18-406(3)(a)(II). This cap applies to medical and recreational growers alike, unless a county or city expressly allows more and the plants are in an enclosed, locked space.
• Plants must be in an enclosed, locked area that is not openly visible, so outdoor grows in plain view are not allowed. Homes with residents under 21 must keep the grow in a separate locked space.
• Homegrown cannabis cannot be sold.

A first offense for growing more than 12 plants in a residence is a level 1 drug petty offense with a fine of up to $1,000; repeat offenses are a misdemeanor or, above 24 plants, a felony. Local governments can be stricter.

Driving and Cannabis in Colorado

Colorado does not use a strict per se THC limit. Instead, if a driver’s blood contains 5 nanograms or more of delta-9 THC per milliliter of whole blood, the court may infer that the driver was under the influence, under C.R.S. 42-4-1301(6)(a)(IV). Drivers can be charged with DUI or driving while ability impaired (DWAI) at any level.

Open packages are also a problem. The state’s driving guidance says neither drivers nor passengers may open cannabis packaging and use it in a vehicle, even when it is not moving. Keep purchases sealed and out of reach.

Taking Cannabis Out of Colorado and to Airports

• State lines: Leaving Colorado with any cannabis product is illegal, the state says. Neighboring New Mexico has legal adult use, but carrying cannabis across the border is still a federal crime. Utah allows medical cannabis only, and Kansas, Nebraska and Wyoming have not legalized it.
• Airports: You cannot bring cannabis to Denver International Airport or any other Colorado airport, according to state guidance.

Colorado Cannabis Taxes in 2026

Colorado’s tax structure has two state layers on recreational cannabis, according to the Colorado Department of Revenue:

• a 15% state retail marijuana sales tax on every retail sale, under C.R.S. 39-28.8-202, which shoppers see at the register, and
• a 15% state excise tax charged on wholesale sales or transfers of retail marijuana from cultivators, which is built into shelf prices rather than added at checkout.

Retail cannabis has been exempt from the regular 2.9% state sales tax since July 1, 2017, though accessories without cannabis are still taxed. Local sales and marijuana taxes vary by city and county. Medical marijuana pays the 2.9% state sales tax and is not subject to the retail marijuana sales tax.

In 2026 the legislature passed HB26-1409, which ends the share of retail marijuana sales tax revenue sent to local governments and redirects it to state funds, and HB26-1077, which changes how the Department of Revenue sets the wholesale “average market rate” used for the excise tax. Neither bill changed the 15% rates a shopper pays, according to the Legislative Council Staff 2026 summary.

Delta-8, THCA and Hemp Products in Colorado

Colorado regulates hemp separately from marijuana. A 2023 law, SB23-271, sorts cannabinoids into non-intoxicating, potentially intoxicating and intoxicating classes and bars the sale of hemp-derived products with more than 1.75 milligrams of THC per serving, Colorado Politics reported. State guidance issued in 2021 barred chemically converting hemp cannabinoids into delta-8 THC.

Federal law bars synthesized and converted hemp cannabinoids from November 12, 2026 and caps naturally derived hemp products at 0.4 mg total THC per container from December 11, 2026. See our federal guide for details.

What Changed in Colorado Cannabis Law Recently

• Tax revenue (2026): HB26-1409 and HB26-1077 passed; see the tax section above.
• Bills that failed (2026): HB26-1117 (consumption at permitted events) and SB26-164 (hemp-derived THC beverages).
• Federal rescheduling (2026): In April 2026 the Justice Department moved marijuana held under a state medical marijuana licence to Schedule III. Colorado’s adult-use market remains in Schedule I while a broader rescheduling proceeding is on hold.

Colorado Marijuana Laws FAQ

More State Cannabis Law Guides

Compare Colorado with its neighbors in our New Mexico, Utah, Oklahoma and Arizona guides, browse every state cannabis law guide, or read our summary of federal marijuana law in 2026. Heading to the Pacific Northwest next? Our directory lists licensed stores in Washington and Oregon.

Neighboring state guides: Wyoming · Nebraska · Kansas · Oklahoma · New Mexico · Arizona · Utah · All state cannabis laws

General information about Colorado cannabis law as of October 2026, not legal advice.