Citizen science is on the rise, and Extension is poised to support this movement by offering technical assistance to citizen science programs, communities, federal partners, and researchers. The expansion of citizen science provides an opportunity for fostering innovative access to Extension resources and increasing engagement with new audiences. To encourage capitalization on this opportunity, we outline Extension's traditional strengths and connect them to the needs of citizen science programs, offer examples of Extension-based citizen science programs that are working with communities to make natural resource management decisions, and make suggestions for ways in which Extension's technical assistance can be shared with the citizen science community to build new partnerships.