Urinary incontinence (UI) is a very prevalent problem for older adults with type 2 diabetes mellitus (T2DM) receiving home care services. However, the complexities of living with UI and T2DM and providing nursing care for older adults in the home care context have received very little research attention. This article describes a protocol for a convergent, mixed methods research design study to address this knowledge and practice gap. The objectives of the proposed study are to (a) determine the prevalence and correlates of UI in older adults living with T2DM receiving home care services, (b) explore the experiences of older adults living with T2DM and UI receiving home care services, (c) explore the experiences of home care nurses caring for this population, and (d) converge the multiple data sources to provide a deeper understanding of the problem and implications for provision of home care services to this population. The research methods are informed by a model of clinical complexity. The quantitative strand will involve descriptive and inferential analysis of standardized home care assessment data (interRAI) to determine the prevalence and correlates of UI in older adults with T2DM receiving home care services. Interpretive description methods will be used in the qualitative strand, and interviews will be conducted with older adults and home care nurses. The findings will be converged to inform a better understanding of the complexity of living with these chronic conditions for older adults receiving home care services and generate implications for complex intervention development. This protocol highlights methodological insights in utilizing mixed methods research to inform intervention design.