Marijuana is one of the most abused drugs in the United States. In recent years, it has become one of the most discussed topics with massive media coverage. The principal reason for its nationwide coverage is a constant debate over its legalization. At present, nine states and Washington, D.C. have legalized recreational marijuana. It has been around six years since marijuana was legalized in Colorado and Washington. Also, medical marijuana is legal in thirty states. However, there is a big divide between people?s beliefs on the matter of marijuana legalization. Proponents of marijuana legalization argue that it would allow people to use a relatively safe substance without the threat of arrest, raise new revenue from marijuana sales, and redirect resources to fund new programs. Opponents of marijuana legalization argue that it is too dangerous to use, lacks FDA approval, and has adverse health consequences, and increased societal costs. The goal of this study is to offer an up-to-date overview of the existing information available on the impact of marijuana legalization on the society in marijuana-legal states. An accurate view of this subject would contribute to increased knowledge and improved awareness among people towards marijuana. However, the nationwide effect of legalizing marijuana remains an open question requiring further research and studies.