Objective: It has been reported that chronically critical patients and patients at high risk of death have moderate to high levels of thirst distress. It was planned as a descriptive and cross-sectional study to determine thirst distress in palliative care patients. Methods: A Patient Information Form, the Thirst Severity Form, and the Thirst Distress Scale were used for data collection. The research was carried out between March 2023 and July 2023 with 157 patients hospitalized in the palliative care services of a state hospital and a training and research hospital in Istanbul, Turkey. Results: Of the patients, 51.6% were female. The mean thirst distress score of the patients was 23.96 ± 5.096. Of the patients, 0.6% had no thirst distress; 7.6% had mild, 48.4% had moderate, 38.9% had high, and 4.5% had severe thirst distress. Thirst scores of patients who were illiterate and did not smoke or drink alcohol were high ( P < .05). The thirst distress score of patients fed with percutaneous endoscopic gastrostomy was higher than that of patients fed with total parenteral nutrition. There was a positive weak correlation between age and thirst distress score, a negative very weak correlation between fluid balance and thirst distress score, and a positive moderate correlation between Visual Analog Scale and thirst distress. Conclusion: Thirst distress was found to be at moderate and high levels in palliative care patients. In patients, thirst should be routinely assessed, and necessary interventions should be planned.