Objectives: This study investigates the relationship of caregiver demographics, caregiving intensity, caregiver support use, and aspects of the caregiving situation to a self-reported measure of unmet need among U.S. informal caregivers of older adults living at home with various conditions.; Methods: Response data from 1,558 caregiver participants interviewed by telephone during the December 2016 baseline period of the Outcome Evaluation of the National Family Caregiver Support Program were used.