<P> In the U.S. state of Maryland, the recreational use of marijuana (cannabis) is illegal . However, since 2014, the possession of 10 grams or less of marijuana has been decriminalized . In 2012, a state law was enacted to establish a state - regulated medical marijuana program . The program became operational on December 1, 2017 . </P> <P> In 2010, Maryland had the fifth - highest overall arrest rate for marijuana possession in the United States, with 409 arrest per 100,000 residents . (The national rate was 256 per 100,000 people). In that year, marijuana arrests made up 49.9% of all drug - possession arrests in the state . In Maryland, blacks were 2.9 times more likely than whites to be arrested for marijuana possession . </P>

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