This paper develops and defends the view that gender is an identity that we confer upon ourselves. The claim that gender is a self-conferred identity is not novel, but its metaphysics is obscure at best. What exactly is an identity, and how do we manage to confer identities upon ourselves? Furthermore, how does the claim that gender is a self-conferred identity comport with the widely accepted notion that gender is also a social identity and that social identities are (at least partly) either conferred upon us by others or constituted by the social positions we occupy? This paper articulates a metaphysics for the self-conferred-identity account that addresses these questions. The most important advantage of the view is that, in contrast to other realist theories about the metaphysics of gender, this one transparently offers a basis for assigning first-person authority to people's judgments about their own gender. [ABSTRACT FROM AUTHOR]