Purpose: With the aging population, our current understanding of patients with cancer and their family caregivers needs to be expanded to older patients with cancer and their caregivers. By differentiating spousal caregivers and non-spousal caregivers, we aimed to investigate the universalities and particularities of caregiving for older patients with cancer.; Methods: Through 11 cancer centers in South Korea, 358 patient-caregiver pairs were recruited in this cross-sectional study.