The main aim of the present study was to study and compare the certain areas of adjustment and academic achievement of senior secondary school students. The present study was conducted on random samples of 100 (50 male And 50 Female Students) of senior secondary school students studying in class 11th and 12th in Navodaya Vidyalayas situated in district Dehradun of Uttarakhand. Bell’s Adjustment Inventory for adolescent students (adapted by R. K. Ojha) was administered for data collection and Average marks (CGPA) of class 10th annual result declared by CBSE (Central Board of Secondary Education) was considered as academic achievement tool to analyze the data. ‘T’ test was used and results revealed that male adolescent differs significantly on an overall adjustment including health, social and emotional adjustment as compared to female adolescent. A significant difference has also existed between male and female adolescent in academic achievement. Students were average in terms of their level of adjustment. However, inverse but significant relationships between academic achievement and adjustment were found for both the groups of students.