Objectives: Available data suggest high burden on caregivers of patients with bipolar disorder (BD), yet the well-being of patients with BD increasingly depends on family members, partners and close friends. As patients with BD get older, the need for informal care may shift. We aimed to describe the caregivers of older adults with BD (OABD) and explore what patients' and caregivers' characteristics are associated with caregiver burden. Method: Forty-seven caregivers of OABD were questioned about their perceived burden and depressive symptoms.