Buying marijuana online is a mix of legal and illegal depending on state vs. federal law:

Receiving illegal shipments through the mail can lead to criminal charges, even if you are in a legal state. Summary Table Recreational Online Purchase Medical Online Purchase Hemp/CBD (Low THC) USA State-specific delivery only State-specific delivery only Generally legal to ship Canada Legal (Authorized sites) Legal (Authorized sites) UK Illegal Legal (with prescription) Legal (Zero THC)

The legality of buying weed online depends entirely on and what specific type of product you are purchasing. Because cannabis laws are fragmented globally, there is no single "yes" or "no" answer. 1. In the United States

Marijuana (over 0.3% THC) is still illegal federally. It is a federal crime to ship marijuana across state lines or through the U.S. Postal Service (USPS), even if moving between two "legal" states .

It is illegal to buy recreational cannabis online in the UK .

Many "online dispensaries" are scams that take payment (often via Zelle, CashApp, or Crypto) and never ship the product.