What is ASPA's place among core public professional organizations as well as public official associations? All public organizations are affected by tough competition for membership. Relatively few members of other public associations join ASPA, and vice versa. Only a minority of faculty members who teach in public affairs programs belong to ASPA, and at top schools, the proportion is even lower. When comparing ASPA to other public official associations, it is smaller in size and broader in scope, yet it remains a uniquely pan-generalist organization. Its pan-generalist character puts it at a disadvantage, but also offers distinct advantages. Like all public associations and nonprofits, ASPA faces stiff competition from increasingly specialized associations for membership. Its key future challenge, the authors suggest, will be to match its membership benefits effectively to the rapidly shifting expectations and needs of current and prospective members.