Poverty and insecurity in Afghan cities are intricately intertwined with conditions of “informality.” The term and the realities it describes refer to living situations in which basic needs and activities such as work, housing, and social security are unprotected by laws and standards. Immersion into such a convolution of informality determines the life of a majority among urban populations in Afghanistan and conveys a deep sense of insecurity for the urban poor. The paper looks at how rapid and unprecedented urban growth in Afghanistan goes along with rising levels of livelihood insecurity and explores how the urban poor cope with livelihood risks through a range of informal arrangements. Conceptually, the notion of “informal security regimes” helps capture informality as a coping strategy and how it relates to urban poverty in Afghanistan. Informed by extensive empirical fieldwork, the paper identifies different elements of the “informal security regime” in urban Afghanistan and explores their specific operations. The paper is mainly focused on the Afghan capital, Kabul, supplemented with evidence from other urban sites in Afghanistan.