 While the question of what gender is has always been a central question for feminism and feminist theory, it has received increased attention in recent years. We will discuss why an account of gender is important for feminist theory and point out how any theorizing is always situated in a political landscape that is both spatially and temporally bounded. The examples we will use are two recent book length treatments of gender, by Sally Haslanger and Charlotte Witt; both offer accounts of the metaphysics of gender, i.e., of the nature of gender categories. We will also mention in passing some other recent accounts, but for a fuller discussion of gender see Mikkola 2016a. 