Assessment of the development and description of the characteristics of social marketing in Poland and the United States with regard to the prevention of gynecological cancers and achievements of these countries. Collective case study based on an analysis of five social campaigns in Poland and five social campaigns in the United States that were focused the gynecological cancers prevention. In the United States, there are more materials available on social campaigns dedicated to the prevention of gynecological cancers, and there are more public organizations that are involved in health promotion activities than in Poland. As opposed to American campaigns, Polish social campaigns did not cover all types of gynecological cancer. The study revealed that Facebook is the most commonly used social media platform by the social campaign organizers. Social marketing tools still have not been fully implemented in the prevention of gynecological cancers either in Poland or in the United States. However, social marketing in the US seems to be more effective in gynecological cancers prevention than Poland.