Objective The aim of this study was to assess the status of diabetes self-management (DSM) among Omanis with type-2 diabetes and its relationship with glycemic control and demographic variables. Methods A correlational descriptive design using questionnaire was conducted with a convenience sample of 266 Omani patients with type-2 diabetes to collect the data. Results The findings indicated that DSM among the study subject is sub-optimal. Only 1% of them were regular on SMBG; 9.5% of them exercise regularly; and 18% of them maintain healthy diet practices. No significant relationship between DSM and glycemic control (p >0.05) was found. DSM was found to be associated with age, gender, level of education, and duration of diabetes. Examining the differences between two regions in Oman (Muscat & Aldhakiliyah) indicated that participants from Muscat differ only in practicing SMBG. Conclusion Results indicated that many Omani patients with type-2 diabetes do not perform DSM consistently. Practice implications The findings of this study set the stage to develop teaching strategies that will improve DSM and subsequently improve diabetes management in patient with type-2 diabetes in Oman.