Best Answer

A federal law illegalizing marijuana -- the Marijuana Tax Act -- was passed in 1937. However, many states, such as Iowa, Texas, Nebraska, Washington, Oregon, Arkansas, Wyoming, and Nevada, had already passed state laws illegalizing marijuana in the 1920s.

See the Related Links below for more information.

User Avatar

Wiki User

14y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: When did marijuana become illegal in the United states?
Write your answer...
Still have questions?
magnify glass
Related questions

What states in the United States of America still consider marijuana illegal?

In four states — Idaho, Kansas, South Carolina and Wyoming — marijuana is fully illegal, according to DISA Global Solutions, a drug testing company.

Are marijuana seeds illegal in Hawaii?

In the United States, yes. In Canada it is illegal also.

Marijuana is illegal in what states?

Marijuana is illegal at the federal level in the United States, but some states have legalized it for medical and/or recreational use. As of October 2021, marijuana is illegal for all uses in Idaho, Nebraska, and South Dakota.

Which drug is the most commonly used illegal substance in the United States?

Marijuana is definitely the most widely used illegal drug in the US. Marijuana is the most widely used illegal drug.

Why was marijuana and heroine legal in the 70's?

Marijuana has been illegal in the United States since 1937, and Heroine has been illegal in the US since 1924.

When did tobacco become illegal to grow?

In the United States, it isn't illegal to grow.

Are drugs illegal in Japan?

No! In fact, their penalties for possession of marijuana are much harsher than in the United States.

Can dependents use marijuana in military housing?

Unless you live in Washington or Colorado, recreational marijuana is illegal. It doesn't matter where or when you take it, it is not legal to consume marijuana in the United States (outside of those 2 states.)

Can you smoke medical marijuana at 16 in California?

No- use of cannabis is illegal at any age throughout the United States.

How many states is marijuana legal?

it's illegal everywhere in the United States, unless if you get a Medical Marijuana License

When was marijuana prohibited?

Marijuana was prohibited in the United States with the passing of the Marihuana Tax Act in 1937, which effectively made it illegal at the federal level.

Was marijuana legal in the 1960s?

Marijuana has been illegal in the United States since 1937. Mandatory sentencing for marijuana offenses arose in the 1950s, and it wasn't until around 1968 that the U.S. drug policy was significantly updated.