Background/Objectives: A significant proportion of older adults with Alzheimer’s disease or related disorders live in a long-term care facility. This study aimed to determine the time delay between admission and death for older adults with dementia. Methods: A post hoc analysis was conducted using data from a French observational cohort, identifying older adults with dementia who were admitted to nursing homes. This study assessed median survival times after admission to care facilities by using Kaplan–Meier models and evaluated factors potentially associated with the time until death by using Cox models. Results: A total of 201 individuals were included. The median survival time from admission to a nursing home to death was 39 months. Being male, an older age, and having higher cognitive impairment and comorbidities were associated with decreased survival rates. Conclusions: This study provides survival results for institutionalised older adults with dementia in France and provides elements for the definition of future public policies.