Background: Although caregiver identity theory asserts there is no single generic caregiver identity, comparisons on demographic characteristics and burden of care have not been made among caregivers of persons with various health conditions. Methods: Using social media to access study participants, this cross-sectional study of 234 family caregivers of persons with various health conditions examined their demographic characteristics (age, gender, and race/ethnicity) and burden of care (daily care hours and caregiving years) using online data collection.