Allergic rhinitis which is on an uprising trend in India varies with geographical location. The present study aimed to investigate the association between allergic scenario, nutritional status and lung function of school children (10-14 years) in the Union Territory of Puducherry. A cross-sectional survey was conducted among 1926 school children (10-14 years) in the Union Territory of Puducherry selected by stratified random sampling method. Anthropometric parameters were measured using prescribed standardized tools and Body Mass Index (BMI) was calculated. Lung function was assessed using Peak Flow Meter and Pulse Oximeter. Details regarding the susceptibility to allergy, frequency of missing school due to respiratory discomforts (henceforth RD), past episode of RD and hospitalization due to RD were elicited using an interview schedule and taken as independent variables. The data was analyzed using SPSS 19 version. Children prone to allergy in Puducherry, Karaikal, Mahe and Yanam were 34%, 31%, 30% and 21% respectively. PEFR value of allergy prone children were lower than the expected PEFR value by 81.37 L/min and 9.6 L/min in Karaikal and Yanam respectively while higher by 36.04 L/min and 0.88 L/min in Mahe and Puducherry respectively.School absenteeism due to RD was 31%, 41%, 47% and 25% in Puducherry, Karaikal, Mahe and Yanam respectively and statistically significant for lung function. Almost 75% of the children in Puducherry, Karaikal and Mahe and 52 % in Yanam were hospitalized due to RD. Within region, more number of children in Karaikal (76.1%), Puducherry (75.1%) and Mahe (74.6%) had experienced RD in the past when compared to Yanam (51.7%) and the results were significant at 0.000 level (X 2 = 50.74). Allergy is quite prevalent among children in the Union Territory of Puducherry and variation in nutritional status and lung function parameters were reported across the four regions.