How Many People in the United States Use Medical Marijuana?

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2.4 M people in the US or 7.77% of the population hold medical marijuana identification cards in the states (and District of Columbia) with mandatory registration, according to the Marijuana Policy Project.

We recognize the possibility that not all medical marijuana users register for identification cards and not all of the people registered have valid medical uses for the marijuana.

State population numbers are estimates from the US Census Bureau’s 2011 data. Patient numbers were last updated in December 2012.

Review the state-by state chart: