Background: Obesity is on the rise worldwide and has been linked to numerous illnesses, including colitis, diabetes, cancer, and cardiovascular disease. Aims and Objective: The purpose of the study is to evaluate physical characteristics and determine the connection between obesity and body composition in medical students. Method: 200 people from Govt. Medical College Jammu, aged 17 to 25, took part in the survey over the course of a year (2019–2020). Following the normal process for measuring body parameters, the following data were calculated: height, weight, total body water (TBW), mineral mass (MM), protein mass (PM), fat mass (FM), fat free mass (FFM), mineral mass (FFM), and BMI. Results: With the exception of body fat mass, which was higher in female students, male students had mean values for all physical characteristics that were greater than those of female students. 76.3% of female participants and 75.58% of male participants exhibited low-risk body fat, while 23.68% of female subjects and 24.42% of male subjects exhibited high-risk body fat. Conclusion: Overall, there is a negative correlation between the BMI of both genders of Jammu medical students and their fat mass. However, among male students who were underweight, there was a favorable relationship between their BMI and fat mass.