Background: The pandemic outbreak of COVID 19 has affected people worldwide. Studies have shown that deficiency of vitamin D is associated with increased susceptibility to respiratory infection. Aim: To evaluate vitamin D status and the possible association of vitamin D levels and biomarkers in COVID-19 patients admitted to the intensive care unit. Methodology: A cross-sectional study done confirmed COVID 19 patients were admitted to ICU. Blood count, vitamin D, inflammatory markers and blood gas parameters were measured. Duration of stay and outcome were recorded. Statistical analysis was done using SPSS V.25 Results: Study done on 155 patients with COVID 19 showed 94.2% participants had Vitamin D deficiency (Vitamin D 20 ng/mL and vitamin D 50 years and the females had lower vitamin D levels. The majority of COVID-19 patients in whom mortality was the outcome, had lower levels of Vitamin D.