Objectives: The study aims to assess the Body Mass Index (BMI) and identify associated factors among school students, and to determine the prevalence of underweight, normal weight, overweight, and obesity based on BMI classification, and examine the relationship between BMI and socio-demographic factors.

Methods: Body mass index is a key indicator of a healthy life, and it varies spatiotemporally. The cohort study involves a survey using a set of questionnaires designed to correlate with various categories, administered to 438 school-going children from rural and urban areas. The main research instrument was the authors’ own questionnaire of demographic information, lifestyle and behavioural factors, sleep patterns, dietary habits, and physical activity. The data were analysed using the number and frequency of variable categories, arithmetic mean and standard deviation, t-test, chi-square test, and ANOVA. The significant difference is taken (p<0.05, 0.01, 0.001).

Results: The study provides insight that urban males are found to be overweight and healthy in comparison to rural males, whereas underweight shows its prevalence in rural males, and no rural male is found to be obese. Rural females showed the highest percentage of healthy individuals, whereas underweight and overweight individuals are predominant in urban females, and cases of obesity are observed in rural females.