This article aims to articulate a political formation that I term Indigenous internationalist feminism, which centers a critique of US imperialism and is premised on three intellectual and political traditions: radical Indigenous internationalism, Black left feminism, and queer Indigenous feminism. Indigenous internationalist feminism provides a framework for transnational Indigenous practices that seek to build counterhegemonic power with other anticolonial, anti-imperial, and anti-capitalist liberation struggles, both within and outside of the United States. At the center of these practices is an ethics of expansive relationality between humans, and between humans and our other-than-human kin.