As a sweeping history of urban incarceration, This Is My Jail shows that jails are critical sites of urban inequality that sustain the racist actions of the police and judges and exacerbate the harms wrought by housing discrimination, segregated schools, and inaccessible health care. Structured by liberal anti-Blackness and legacies of violence, today's jails reflect longstanding local commitments to the unfreedom of poor people of color.