There is significant public support for legalizing, regulating, and taxing recreational marijuana in Illinois. Fully 66 percent of registered voters in Illinois support legalizing marijuana, including a bi-partisan majority of Democrats and Republicans. Furthermore, 10 states and the District of Columbia have already legalized recreational marijuana. This report finds that high taxpayer costs for law enforcement and cannabis-related incarceration would be reduced by legalizing recreational marijuana. In total, Illinois taxpayers would save $18.4 million annually in reduced incarceration costs, law enforcement spending, and legal fees from marijuana legalization. This revenue could be redirected to solve other crimes– such as homicides, robberies, and assaults. The economy would also grow if Illinois were to legalize recreational marijuana. If marijuana were legalized, regulated, and taxed in Illinois, an estimated $1.6 billion would be sold in the state, in part due to regional tourism.