Although the concept of gender identity plays a prominent role in campaigns for trans rights, it is not well understood, and common definitions suffer from a problematic circularity. This paper undertakes an ameliorative inquiry into the concept of gender identity, taking as a starting point the ways in which trans rights movements seek to use the concept. First, I set out six desiderata that a target concept of gender identity should meet. I then consider three analytic accounts of gender identity: (...) the dispositional account, the self-identification account, and the norm-relevancy account. I argue that only the norm-relevancy account can meet all six desiderata. Finally, I defend the norm-relevancy account from three objections: that it is cis-normative, that it has problematic implications regarding trans women, and that it entails that some people do not have the gender identity they take themselves to have. (shrink)