AbstractCollaboration is a widely employed strategy for addressing “wicked” policy problems. While scholars have long recognized that the organizational composition of collaborative forums can have a dramatic impact on the efficacy and equity of associated forum outputs, little is known about whether such composition impacts the manner in which everyday citizens perceive forum processes and/or participating organizations. In this article, we bridge and extend concepts from the collaborative governance and representative bureaucracy literatures, arguing that when forums attract sufficient membership from organizations that citizens perceive as reflective of their own or their community's interests—what we refer to as “forum representation”—those citizens will have more positive perceptions toward all participating organizations. Conversely, failing to achieve sufficient representation can result in degraded perceptions. While there are theoretically multiple ways to increase forum representation, we focus on one potential pathway: the inclusion of civil society organizations in policy‐making processes. Empirically, we assess whether heightened representation of civil society groups within a specific collaborative policing forum impacts citizens' perceptions of the main participating agency—the police department—finding that greater knowledge of this highly representative forum results in positive spillover effects.