This document describes a social network approach to addressing unmet need for family planning in Benin. The project aims to understand social barriers to family planning use and test interventions to overcome them. Researchers conducted participatory mapping to identify influential social groups and individuals. They selected groups of women, men and mixed gender to engage based on size, meeting frequency, links to others and influence. The project then worked with these groups and key influentials to diffuse family planning information, assessing how ideas spread within their networks. The social network approach focuses on leveraging relationships between influential entities to promote behavior change.