Background: Respiratory tract infections (RTIs) continue to be one of the significant factors contributing to illness and death in patients . Numerous studies have linked vitamin D deficiency to a higher risk of RTIs, leading to the consideration of vitamin D supplementation as a potential preventive strategy against RTIs in patients . To study vitamin D levels in patients with recurrent respiratory infections. Materials & Methods: 100 subjects were enrolled. The age was between 5 months to 15 years, who were either admitted or attending as outpatients due to recurrent respiratory infections, were enrolled as cases. The proportions were analyzed using the chi-square test. The p-value of less than 0.05 was considered statistically significant. Results: The average age of the cases and controls was 70.56 months and 55.4 months, respectively. Among the cases, 80% were found to be deficient in vitamin D, while 20% exhibited insufficient vitamin D levels. Conclusion: Patients experiencing recurrent respiratory infections showed a significantly elevated incidence of vitamin D deficiency when compared to the control group.