Interaction between the government and the citizen is essential to improve public service and promote government openness. Knowledge resulted from e-participation initiatives is an asset for a government institution, especially to enable innovation. However, integrative study about knowledge management (KM) to support e-participation is currently lacking in the literature. Therefore, this study aimed to identify the state of the art of emerging knowledge management solution for participative government. The present study employed the Kitchenham method to explore literature related to knowledge management in the e-participation context. There were seventeen articles included in this study. Several alternatives to KM application, mechanism, and impacts were identified in this study. The findings of this study are expected to be a reference for further innovation in knowledge management, especially to optimize the potential of a combination of expert and public knowledge to enhance public service quality.