Abstract: Hannah Arendt’s account of imperialism has become an unlikely source of inspiration for scholars invested in anti-colonial and postcolonial critique. However, the role of settler colonialism in her thought has come under far less scrutiny. This essay reconstructs Arendt’s account of settler-colonization. It argues that Arendt’s republican analysis of imperialism hinges on her notion of the boomerang effect, which is absent in settler-colonial contexts. Arendt recognized some of the distinctive features of settler expansionism but reproduced many of the ideologies that sustain practices of settler-colonial conquest. This interpretation sheds light on the promises and limits of contemporary retrievals of Arendt’s analysis and critique of imperialism by foregrounding the specificity of settler colonialism as an axis of ongoing colonial violence.