Background: Dementia of Alzheimer’s disease (AD) imposes burdens on patients, caregivers, and society. This cross-sectional study examined caregiver-reported history of disease onset and AD dementia to inform efforts promoting early disease detection and diagnosis. Methods: An online survey collected self-reported cross-sectional data – demographic characteristics, diagnosis, treatment experiences, and other information on disease detection, diagnosis, and treatment – from caregivers of patients with AD dementia.