An increasing number of nonprofit organizations are exploring mergers -- the process by which at least two nonprofit corporations join to form one legal entity. Yet, little is known about nonprofits' experiences with the merger process. What leads nonprofits to explore a merger and what outcomes do they expect to achieve as a result? Who within the organization is typically involved in facilitating the merger? How long do mergers take to complete, what do they cost and, above all, what are the results? Drawing on the experiences of 22 nonprofit organizations in Allegheny County that explored, attempted or completed a merger, combined with a comprehensive literature review, this report seeks to answer those questions and provide recommendations that nonprofits and funders can use to inform their conversations about the merger process.