Scholarship on minorities in the inter-war period have largely ignored the Flemish question. One obvious reason is that the Flemish accounted for a majority of Belgium’s population. This article, however, argues that the domestic and international historiography would benefit from considering the Flemish a minority, albeit a peculiar one. I suggest that the Flemish question embodies the contradictions of an age in which the nationality question ‘morphed into the minority question’ (as Holly Case has pointed out) without disappearing altogether. The article traces the evolution of different understandings of Flanders in the Belgo-Dutch-German transnational space and shows how such understandings challenge traditional conceptions of minorities, majorities, nationalities and kin states. The article further contributes to a broader shift in historiographies of nationalism and diversity in inter-war Europe by moving focus from East to West and considering minority questions as a pan-European phenomenon.