The purpose of this paper is to introduce such a tool—the Integrated Questionnaire for the Measurement of Social Capital (SC-IQ)—with a focus on applications in developing countries. The tool aims to generate quantitative data on various dimensions of social capital as part of a larger household survey (such as the Living Standards Measurement Survey or a household income/expenditure survey). Specifically, six dimensions are considered: groups and networks; trust and solidarity; collective action and cooperation; information and communication; social cohesion and inclusion; empowerment and political action. The paper addresses sampling and data collection issues for implementing the SC-IQ and provides guidance for the use and analysis of data. The tool has been pilot-tested in Albania and Nigeria and a review of lessons learned is presented.