This article examines the legal consciousness and incorporation experiences of undocumented immigrants in the United States. Although this population may be disaggregated along several axes, one central distinction among them is their age at migration. Those who migrated as adults live out their daily lives in different social contexts than those who migrated as children. Therefore, although all undocumented immigrants are legally banned, their identities, sense of belonging, and interpretation of their status vary. Based on ethnographic observations and in-depth interviews of Latino undocumented immigrants from 2001 to 2010, I examine how illegality is experienced differently by social position. The findings suggest that the role of life-stage at migration and work-versus-school contexts importantly inform immigrants' legal consciousness. Fear predominates in the legal consciousness of first-generation undocumented immigrants, while the legal consciousness of the 1.5 generation is more heavily infused with stigma. Fear and stigma are both barriers to claims-making, but they may affect undocumented immigrants' potential for collective mobilization in different ways.