Reputation refers to the set of judgments a community makes about its members. In cultures of honor, reputation constitutes one of the most pressing concerns of individuals. Reputational concerns are intimately intertwined with people’s social identities. However, research has yet to address the question of how honor-related reputational concerns are structured at the within-person level vis-à-vis individuals’ identification with relevant group memberships. The present longitudinal study investigated the association between social identification and reputational concerns in southern Italy (N1st-wave = 1,173), a little-studied culture of honor. Specifically, using a random intercept cross-lagged panel model, we tested whether reputational concerns predict, are predicted by, or are bidirectionally linked to individuals’ identification with their region, a group membership relevant for the endorsement of honor. Findings revealed a positive association at the within-person level between group identification and subsequent honor-related concerns. Longitudinal paths from reputational concerns to identification were not significant. Implications of the findings and directions for future research are discussed.