Banking is increasingly a-spatial. However, the environment matters for small banks. Indeed, they are embedded in narrowed markets and hence benefit from proximity to their member-customers. By referring to multilevel approach, this article aims at measuring how much the performance of Italian mutual-cooperative banks is determined by both geographical (provincial level) and individual characteristics (small bank level). The effect of local markets explains 28.27% of bank heterogeneity in the empty multilevel model and 33% in the most extended model. Moreover, it is found that bank efficiency increases with market concentration and demand density and decreases with branching in local markets.JEL codes: G21, C13, D00, R19