This research discusses the social impacts of casinos. The most direct impacts are those associated with increases in gambling problems, which are double for a person living within 50 miles of a casino. We estimate that when a casino is built in Columbus, there may be over 22,000 new problem and pathological gamblers in Franklin County. Using figures from The National Opinion Research Center at the University of Chicago, we estimate that the ongoing, annual costs to address this increase in problem gambling could be $28 million, and the one time/lifetime costs for events such as divorce and bankruptcy could be $223 million. These social costs will be borne by human services systems, businesses, government, and individuals and families.