Many migrants who inhabit cities are illegalized, excluded from formal membership in urban communities, and denied full participation in urban life. In this article, I examine the possibilities of all inhabitants to belong to the city. Drawing on Ernst Bloch, David Harvey, Henry Lefebvre, and others, I theorize different “layers” of possibility and review the literature to explore how these layers apply to urban belonging. Furthermore, I investigate how urban protests and activist practices can materially transform the city to be more accommodating to illegalized migrants, while evoking the different layers of possibility. I conclude with a discussion of the practical and theoretical implications of contemplating the possibilities of urban belonging.