This article examines the role of women in the politics of the Oodua People's Congress (OPC), a militant ethno-nationalist movement of the Yoruba people in south-west Nigeria. Women's inclusion in the organizational structure and their typical roles within the OPC, the article suggests, expand the political agency of women but at the same time ensure that their contributions are contained within the OPC's overall politics. Women play important roles within the OPC, primarily by enabling and supporting the vigilante activities of male OPC members. In the provision of this support, women overwhelmingly draw on the knowledge and powers associated with typically female life experiences. As a result, women's interests are represented within the overall agenda of the OPC, but on the basis of complementary rather than egalitarian gender roles.