Over the next decade, marijuana could well be one of the fastest-growing industries in the United States. Tech stocks may be the toast of Wall Street this year, but "Marijuana Business Factbook 2020" from Marijuana Business Daily has projected that legal-channel cannabis sales in the U.S. could triple between 2019 and 2024 to $37 billion. 

Such rapid sales growth has been made possible by a dramatic shift in how the American public views cannabis. National pollster Gallup found that only around a third of the country favored legalization by the mid-2000s. But in 2018 and 2019, support for nationwide adult-use legalization hit an all-time high of 66%. As Americans have softened their stance on cannabis, legislative action and state-level elections have allowed the green wave to take shape. 

However, the legality of marijuana can differ wildly depending on where you live. With the 2020 election now in the books, here's a full rundown of where all 50 states stand on marijuana.

A black silhouette of the U.S., partially filled in by baggies of cannabis, rolled joints, and a scale.

Image source: Getty Images.

Marijuana is fully legalized and retail sales are ongoing

Following the green sweep on election night, there are now 15 states that have given a thumbs-up to recreational and medical marijuana. But not all of them are currently selling the product. Right now, 10 states have waved the green flag on the sale and consumption of adult-use weed (listed alphabetically):

  • Alaska
  • California
  • Colorado
  • Illinois
  • Maine
  • Massachusetts
  • Michigan
  • Nevada
  • Oregon
  • Washington

Despite legalizing adult-use cannabis in November 2016, it took Maine until Oct. 9, 2020 to officially launch the retail sale of recreational pot. Illinois also stands out as the first state to legalize the recreational consumption and sale of marijuana entirely at the legislative level.

California is the most populous state in the country and the most valuable marijuana market in the U.S. (and world). Though estimates vary, the Golden State could be raking in up to $11 billion in annual sales by 2030.

A bearded man holding a lit cannabis joint by his fingertips.

Image source: Getty Images.

Cannabis has been fully legalized, but retail sales haven't yet commenced

That leaves five states that have passed legislation or voted to legalize adult-use cannabis (on top of medical use), but which haven't yet opened retail locations. These five states are:

  • Arizona
  • Montana
  • New Jersey
  • South Dakota
  • Vermont

If some of these names sound familiar, it's because voters in Arizona, Montana, New Jersey, and South Dakota all approved recreational cannabis measures in their respective states in the 2020 election. The measures in New Jersey and Arizona passed in a landslide, while votes in Montana and South Dakota were a bit closer. South Dakota is especially noteworthy as it's the first state to go from completely illegal to recreationally legal in one election.

As for Vermont, its state legislature legalized the consumption of recreational pot in January 2018 but not the retail sale of the product. In October 2020, the Vermont State Legislature passed a bill legalizing its retail sale. However, dispensary licenses can't be issued until October 2022, so it could still be up to two years before adult-use weed sales commence. 

A cannabis bud lying atop a doctor's prescription pad.

Image source: Getty Images.

Medical marijuana is legalized, but adult-use weed is illegal

After the 15 states that've legalized both recreational and medical cannabis, 21 additional states have waved the green flag solely on medical marijuana. In alphabetical order, these states are:

  • Arkansas
  • Connecticut
  • Delaware
  • Florida
  • Hawaii
  • Louisiana
  • Maryland
  • Minnesota
  • Mississippi
  • Missouri
  • New Hampshire
  • New Mexico
  • New York
  • North Dakota
  • Ohio
  • Oklahoma
  • Pennsylvania
  • Rhode Island
  • Utah
  • Virginia
  • West Virginia

Even though it's traditionally one of the most conservative states in the country, Mississippi's medical cannabis ballot measure passed in a landslide in the 2020 election.

For some states, like Florida, medical marijuana is big business. But medical sales are often cannibalized once adult-use weed is legalized. According to Ballotpedia, five medically legal states are already prepping recreational cannabis ballot measures for the November 2022 election: Arkansas, Florida, North Dakota, Oklahoma, and Mississippi. 

A drug free zone street sign in a residential neighborhood.

Image source: Getty Images.

Both recreational and medical marijuana are illegal

Finally, there are 14 states where cannabis is illegal... period! These states are:

  • Alabama
  • Georgia
  • Idaho
  • Indiana
  • Iowa
  • Kansas
  • Kentucky
  • Nebraska
  • North Carolina
  • South Carolina
  • Tennessee
  • Texas
  • Wisconsin
  • Wyoming

The prevailing theme here is these are states predominantly run by Republican lawmakers. Surveys have shown that while Democrats and Independents are overwhelmingly in favor of a nationwide legalization of cannabis, Republicans aren't nearly as excited. Most polls (including Gallup) show support for adult-use weed right around the 50% mark for Republicans, with favorability toward medical cannabis notably higher.

A tipped over jar packed with cannabis buds that's lying atop a small pile of cash.

Image source: Getty Images.

The big picture remains bright for cannabis stocks

It's been 24 years since California became the first state to OK medical cannabis, and since then, 35 additional states have legalized weed in some capacity. The U.S. map is going green at a remarkably steady pace without the help of the federal government, and marijuana stocks are going to be the big beneficiary.

Although cannabis stocks have somewhat struggled over the past 19 months, vertically integrated multistate operators like Green Thumb Industries (OTC:GTBIF) and Trulieve Cannabis (OTC:TCNNF) have given folks a glimpse of what's possible from the investment side of the equation. Green Thumb has opened around four dozen dispensaries nationwide but has enough licenses in its back pocket to double its retail presence to 96 stores. Meanwhile, Trulieve Cannabis has over five dozen dispensaries open in Florida alone and is currently the most nominally profitable pot stock in North America.

The green rush is well underway. The only question is, will you take part?

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.