The past decade has seen a surge of interest in the walkable neighborhood, motivated by environmental, health, economic, and communitarian goals. We take stock of this literature by linking together the various strands of research in which the "walkable neighborhood" is a primary concern. We organize the literature into three broad categories: measurement, criticism, and tests of the benefits of walkable neighborhoods. The latter category involves three primary claims. We find that claims about social impacts are the weakest in terms of research support, in part, because there continues to be a problem of self-selection and an inability to assign causality.