Introduction: Diabetes mellitus, a metabolic disease known for its chronic nature and multiple aetiologies, has risen to a level of a significant public health problem in the past few years. Although Glycaemic control is the mainstay of managing the disease, self-care habits like a healthy diet, active exercise, periodic monitoring of blood glucose, and medication play an essential role in managing Diabetes. Methodology: A cross-sectional study based in the community was conducted in the catchment areas of a medical college in the district of Gautam Buddha Nagar. Data was collected by using a structured questionnaire from diabetic patients residing in the urban catchment area of Bhangel. The study was conducted with the following objectives: determining the prevalence of self-care practices among known cases of Diabetes residing in the urban slum population and assessing sociodemographic risk factors. Results: Data was collected from 190 study participants by conducting a door-to-door survey. Most study participants (59.5%) have unsatisfactory self-care practices except in Adherence to medication and periodic blood sugar checks 61.2% and 68.4%, respectively. The lowest (18.9%) adherence was observed for foot care among study participants. Conclusion: The study was conducted among 190 people with Diabetes residing in urban slums, and their self-care practices were variable. While most study participants adhered well to medication and periodic blood sugar monitoring, less than half had control over their lifestyle (diet, exercise, and foot care).