Seek out the status of Medical Marijuana legalized Countries and, U.S.A. states, counties and territories.
Where decriminalization applies even if full legalization isn't in place, because the number of counties and districts within each state is vast and continually changing regarding local ordinances, I won't be able to list them all here.
This information is for general knowledge and may change. Always consult the most current state and local laws for the most accurate information. Marijuana remains illegal at the federal level.
Key
MM Medical Marijuana Legal
RM Recreational Marijuana Legal
D Decriminalized (meaning possession of small amounts results in civil penalties, like a fine, rather than criminal charges)