Identity formation has been a keen area of interest for researchers and it involves several physiological, cognitive, biological, emotional and hormonal changes often influenced by the adolescent's social environment. Adler conceptualized the notion that birth order of a person can leave an indelible impression on an individual's style of life. Birth order has a profound effect on how an adolescent is perceived by his family and how a person relates to the amount of responsibility, independence and freedom he or she has been given. Based on this ideology, this paper attempts to understand the influence of birth order on the identity formation of middle adolescents. The exploratory study undertakes a purposive sampling of 158 respondents (79 males and 79 females). Ego Identity Process Questionnaire (EIPQ) and Global Adjustment Inventory were the tools used for data collection. Correlation analysis indicated significant relationship between identity and various dimensions of adjustment. t-ratios were applied to study gender differences, though no significant results were found. Also, one-way ANOVA was applied to study between group differences. However, findings suggested no significant differences between the first and third born individuals for their identity formation process.