This chapter provides an introductory overview of theories of identity and indicates some of the broad ways in which they might be applied to young people's interactions with digital media. The first part of the chapter offers a brief account of five major areas of theory: social-psychological theories of adolescence; sociological theories of youth culture; theories of social identity, and the relations between individuals and groups; notions of identity politics; and theories of subjectivity and modernity. The second part of the chapter covers three major themes that are at stake in the analysis of young people and digital media: theories of technology; the notion of young people as a “digital generation”; and the place of learning, both in and beyond schools. In this course of this broad-ranging overview, the chapter also prefigures some of the more specific themes addressed in the chapters that make up the remainder of the volume.