This article aims to advance the methodology for assessing the social impact of tourism research. An evaluation framework was designed to measure social impact in three stages—ex-ante, in-itinere and ex-post—and the ex-post evaluation was applied to a tourism research project, the POLITUR project, to test its validity. The collected information originated from interviews and documentary material. The analysis was structured according to six main areas—communication and promotion, policies and regulation, economic benefit, new technological resources, environment and social improvements—and four dimensions—temporal, applied, geographical and sustainability. The results are followed by a discussion of the domains and dimensions of the social impact assessment of tourism research. The need for further improvement in methods for measuring the social impact of tourism research and the importance of research that generates social impact are highlighted.