There has been a great deal of research into school choice and the education quasi-market that has dominated compulsory school provision in the United Kingdom since the early 1980s. Much of this research fails to address the context in which processes of choice exist alongside the patterns and outcomes of choice and competition, leading to considerable dispute within UK debates on the impact of school choice. The apparent contradiction can be bridged by focusing on the geographic particularities of the education market at various scales. This article examines one urban education market in the United Kingdom. In mapping the context and patterns of school choice and competition, the article begins to offer new insights into understanding recent trends in social segregation between schools. Such an approach to studying the impact of open enrollment and the marketization of compulsory schooling represents a necessary shift toward the development of a geography of school choice. (Contains 8 notes, 3 tables, and 3 figures.)