In discussing reform of public schools, the conversation is usually about schools; in this article I examine the meaning of public, drawing on Dewey's (1927/1954/1988) understanding of the nature of a public and its importance to democratic life. Vouchers and other market challenges to public education are a danger to the existence of a public, and a threat to democratic life. I consider the relevant differences between publics, markets, and audiences, and their relation to democracy. Finally, I consider public schools as both a reflection of public will and a central means to create a public.