One of the potentially fatal consequences for diabetic patients is diabetic ketoacidosis acidosis (DKA), which is also linked to poor hospital outcomes. There is no much information in literature about COVID-19 and how it relates to other hospitalizations. The impact of COVID-19 on in-hospital mortality and other clinically relevant outcomes for DKA patients is being investigated for the first time in this study. Patients admitted with a primary diagnosis of DKA with or without a subsequent diagnosis of COVID-19 Infection were found in the National Inpatient Sample (NIS) Database 2020. Patients were divided into two groups: those who have COVID-19 and those who don't. Univariate and multivariate logistic regression models were utilized to account for frequent confounders and assess the risk of mortality and in-hospital outcomes between the two groups. The total of 110,130 DKA admissions were identified between Jan and Dec 2020. COVID-19 Infection was diagnosed in 2,504 patients (2.2%). The average age of the cohort sample was 35 years old, 51% were male, and 60% were white. The average length of stay (LOS) was 3 days, and the average total hospital charges were 33,132 US dollars. The total number of patients who died was 225 patients. When the two groups were compared, COVID-19 Infection was associated with an increased risk of in-hospital mortality among DKA patients (OR 5.3, 95% CI 1.7–15.9, p=0.003). COVID-19 patients had a higher risk of acute respiratory failure (OR 2.9, 95% CI 1.7–3.9, p< 0.001) and septic shock (OR 3.9, 95% CI 1.5–9.8, p=0.003). There was no significant difference between the COVID-19 and non-COVID-19 groups in the risk of acute coronary syndrome (OR 1.2, 95% CI 0.49–3, p=0.66), cardiac arrest (OR 2, 95% CI 0.5–7.9, p=0.31), hypokalemia (OR 1.14, 95% CI 0.92–1.4, p=0.214), deep vein thrombosis (OR 0.59, 95% CI 0.14–2.4, p=0.47), or pulmonary embolism (OR 3.6, 95% CI 0.84 – 15.4, p=0.083). COVID-19 patients had a longer mean LOS (4.2 vs 2.9 days, p< 0.001) and higher mean total hospital charges (41,216 vs 32,973 $, p=0.004). Patients admitted with DKA and concomitant COVID-19 infection found to have a higher risk of in-hospital mortality and worse hospital outcomes, particularly acute respiratory failure and septic shock. In comparison to non-COVID patients, COVID-19 patients have a longer mean LOS and a higher mean of total hospital charges.