Cities both constrain and enable diverse forms of sexual pleasure. The links between sex and the city have been theorized in relation to the sexual lives of urban inhabitants and the erotic potential of city landscapes. The majority of sexual relations that take place in cities are heterosexual, and yet much of the work that has explicitly addressed urban sexual life has focused on lesbian and gay lives, sex work, and other “deviant” sexual practices. This entry charts how certain forms of sexuality and certain urban spaces in a minority of cities have come to dominate debates about urban sexualities. It concludes by considering how these debates might be extended by attending to a wider range of urban sites in cities around the world.