In this article the authors have presented the history and organizational structure of the UEFA Euro 2012. They describe the main investments accompanying the organization of the competition in Poland, and particularly in Wrocław (one of the host cities). They also present a synthesis of the costs and benefits connected with organizing the championship. For the needs of the article, a survey was taken of Wrocław residents asking them what results they foresaw from the organization of the event. The aim of the research was to determine perceptions of the Euro 2012’s expected social, economic, and promotional effects for the city and the country.