Social Innovation, a grassroots approach to innovation management, is proving to be a valuable complement to traditional, top-down methodologies of managing innovation. It is, however, relatively new and inherently less structured than traditional methodologies. As a result, innovation leaders often find it difficult to measure performance and evaluate health of their innovation communities. This presentation first defines social innovation. It then defines a set of social metrics that can be measured and used as the leading indicators of success of social innovation efforts.