This chapter details the latest information available on the use of technology among college students and what is known about the impacts of this use on their well-being. A variety of studies examine the use of different types of technologies among individuals across the life course; however, fewer studies examine the social impacts of these technologies, particularly in relation to well-being. This chapter reviews the extent of the social impacts of technology in relation to well-being for college students. Before this can occur, however, we need a better understanding of what well-being means.Social and behavioral scientists typically think about indicators of stress, loneliness, social support, self-esteem, psychological distress, and depression as well-being outcomes. Clinicians focus more often on physical health conditions, diseases, and illnesses. The range of outcomes considered under the concept of well-being could also include such things as alcohol use and abuse, Internet addiction (excessive use of the Internet that may result in a variety of types of problems for individuals), obsessivecompulsive tendencies, and a host of other well-being outcomes. This chapter focuses primarily on the psychosocial and mental health outcomes that are most often examined in the social and behavioral sciences. One can think theoretically about how technology use might bear on some of these well-being outcomes; however, this chapter provides evidence that little empirical research has examined many of these outcomes singularly or in combination with other outcomes. 55 4