Presented at OLA Super Conference 2016 In recent years, libraries around the world have been conducting impact studies, predominantly economic impact studies, to communicate their value to stakeholders. While these studies are useful, they often exclude the social, educational and cultural impacts that libraries make within their communities. To address this gap, Dr. Mary Cavanagh, Dr. Bill Irwin and Kimberly Silk are collaborating to develop the L-Index, a library evaluation methodology and toolkit designed to aid libraries in assessing their economic, social, cultural and educational impact. The team will present their work to date, and invite feedback from session delegates.