Where is marijuana fully legal?

Nowhere.

No country permits free unlimited use of marijuana; in no jurisdiction is it fully legal. Those few areas that permit marijuana use still have many restrictions on it:
  • California allows use of marijuana as a prescription medicine, for its pain-alleviating and relaxant effects; there is a list of conditions for which it may be prescribed.
  • Other areas in the USA have legalised marijuana, but the federal laws of the country trump state laws, making these state and local laws somewhat irrelevant and pointless. However, it is a cloudy issue (given the tangle of statements that is the the Bill Of Rights). Basically, a federal agent may prosecute a person breaking a federal law, but the federal government cannot force or require the state government to assist in such prosecution or investigation and so many users escape punishment.
  • Marijuana in the Netherlands, contrary to popular belief, is illegal. However, the government has a policy of non-enforcement as a separation of 'soft' drugs from 'hard' ones. This involves people who have minimal amounts (5 plants or 5 grams per adult is the guideline amount) not being prosecuted or even investigated. "Coffee shops" are also often left alone, provided they have less than certain amounts on site.
  • India allows its sale for some Hindu rituals. All (legal) sales are made in government-owned shops.
  • Iranians use the seeds as a food, so their use this way is legal. Use as a psychoactive is illegal; however because of the large number of other herbs that are tolerated and legal, prosecution for this is rare.
  • Some other countries allow personal use and some small possession only (cultivation is sometimes permitted; dealing and trafficking are invariably still illegal). They include:
    • Argentina
    • Some states in Australia
    • Belgium
    • Chile
    • Colombia
    • Croatia
    • Czech Republic
    • Germany - if the amount is small, any possessed plant or drugs will be confiscated, but not prosecuted.
    • Macedonia
    • Mexico
    • Peru - possession of limited amounts is legal as long as the person does not possess any other drugs.
    • Portugal
    • Russia
    • Spain
    • Uruguay - personal use is legal but sale is not. The law does not specify an amount regarded as/as not for personal use.
    • Venezuela - possession in small amounts requires a person to take a drug rehabilitation course, but no prosecution.

The only state where weed is legal is Colorado. It is also legal in Peru.