© Lippincott Williams & Wilkins. Burnout, a condition characterized by emotional exhaustion, depersonalization, and decreased personal accomplishment, has been studied in many disciplines in health care, including nursing, medicine, and social work. The purpose of this study was to examine the relationship between perceived organizational support, coworker social support, the nursing practice environment, and nurse demographics (age, years of nursing experience, education level, marital status, and sex) on burnout in a national sample of palliative care nurses. The study aims were (1) to examine the relationship between perceived organizational support, coworker social support, and nursing practice environment on burnout in palliative care nurses; (2) to examine the relationship between age, years of nursing experience, education level, marital status, and sex on burnout in palliative care nurses; and (3) to examine potential moderators (perceived organizational support and coworker social support) on the relationship between demographic characteristics and palliative care nurse burnout. A convenience sample of 73 Hospice and Palliative Nurses Association registered nurses who were bedside caregivers was recruited from Hospice and Palliative Nurses Association's membership. Data were analyzed using Pearson correlation and regression modeling. Findings indicated palliative care nurses had moderate to high levels of burnout. There was a negative correlation between burnout and perceived organizational support, and between burnout and coworker social support. The nursing practice environment of palliative care nurses was favorable; perceived organizational support and coworker social support were not moderators for demographics of age and years of experience and their relationship to burnout.