Introduction: Many studies have shown that vitamin D deficiency have been associated with multiple autoimmune conditions like psoriasis, rheumatoid arthritis, diabetes mellitus. Objective: The main purpose of this study was to analyze vitamin D status of psoriasis patients in comparison to healthy controls. Materials and Methods: The study comprised of 50 (30 male & 20 female) clinically confirmed cases of chronic plaque psoriasis of age group (20-60 years) attending outpatient department of Dermatology, venereology, leprosy, Vinayaka Mission’s Medical College & Hospital, Karaikal from 2012 to 2014.At the same time 50 healthy individuals without psoriasis were also investigated (age & sex matched). Results: The mean serum 25-OHD levels in psoriatic patients and controls were 22.308+_2.974 and 33.726 +_2.688 ng/ml respectively. The difference was statistically significant (P=<0.0001). Limitations: Additional studies with bigger numbers of patients are essential to evaluate the pathogenic mechanisms associated with psoriasis and vitamin D. © 2023 Elsevier B.V., All rights reserved.