While the scholarship of interdisciplinarity has grown prolifically in the last thirty years, the discourse primarily frames interdisciplinarity as an instrumental research construct. In this article, I will argue that this framework should be expanded to consider how interdisciplinary engagement can support education for democracy. The article will begin by giving an account of the role that interdisciplinarity can play in the context of democratic education. I will then argue that a lesser-theorized form of interdisciplinarity called "critical interdisciplinarity" is uniquely situated to advance democratic aims in higher education. Finally, through the lens of a curricular project conducted on my campus, I will show how critical interdisciplinarity may be deployed to advance democratic aims in higher education. Ultimately, I will make a case for the significance of critical interdisciplinarity as a central form of democratic engagement in university life and call for the expansion of its discussion in the interdisciplinary literature.