Introduction: Type 2 diabetes mellitus in the Americas affects approximately 62 million people, recognized as the most common chronic disease in the countries. It is estimated that by 2030, population growth, aging, urbanization, and lifestyle changes will lead to a 54% increase in diabetes, significantly impacting quality of life. Objective: To determine the level of quality of life among patients with type 2 diabetes mellitus in the Province of Barranca, Lima Region, Peru. Methods: Observational study with a descriptive design. The study population consisted of 242 patients attending a public hospital in the Province of Barranca, with a random sample of 144 patients. Data collection was conducted in the second quarter of 2021 through interviews using the WHOQOL-BREF questionnaire. Data analysis was performed using SPSS v.24 software. Results: 69% of the patients were female, aged betwe...