The popularity of facebook is unprecedented. However, in spite of its huge popularity and user base, a considerable portion of internet users are not facebook users. The present study therefore examined the difference between facebook users and non-users with respect to personality, attachment style, social interaction anxiety and self-esteem; to obtain a depiction of the type of people who are likely (or not likely) to use facebook. The sample consisted of 120 male and female facebook users and non-users between 18-35 years. The General Health Questionnaire (GHQ-12), the Facebook Intensity Scale (FBI), the Neo Five- Factor Inventory (NEO-FFI), the Relationship Scales Questionnaire (RSQ), the Social Interaction Anxiety Scale (SIAS) and the Rosenberg Self-Esteem Scale (RSES) were used. The results revealed that facebook users were more extravert and open, while non-users were more conscientious than users. Facebook users had high self-esteem and low social interaction anxiety than non-users. Users possessed secure attachment style, while non-users had a fearful attachment style. © Journal of the Indian Academy of Applied Psychology.