This hospital used a standardized cut off value for the plasma vitamin-D level of 50 nmol/L. Forty-nine patients (29.7%) had normal levels (>50 nmol/L) and the rest (70.3%) had vitamin-D deficiency (<50 nmol/L). A greater proportion (82%) of critically ill COVID-19 patients had vitamin-D deficiency compared to those not requiring ICU admission (65.2%). Among the ICU patients, low vitamin D level (<50 nmol/L) was associated with younger age and markers indicative of higher viral loads. However, there were no significant differences in ICU clinical outcomes (invasive and non-invasive mechanical ventilation, acute kidney injury and mechanical ventilation and hospital days) between patients with low and normal vitamin-D levels.