Background: Insufficient knowledge of palliative radiotherapy (PRT) among hospice and palliative medicine (HPM) physicians is thought to be a barrier to the provision of high-quality palliative care. Objective: To assess the need for PRT education in HPM fellowship. Design: A cross-sectional survey of HPM fellows was conducted in June 2018. Setting/Subjects: The survey was distributed to accredited HPM fellowship programs in the United States for distribution to enrolled fellows; 114 fellows responded to the survey. Results: Nearly all respondents agreed that the principles of PRT should be taught in HPM fellowship, yet 51% had received no PRT education and 35% had received only one or two hours. Only 25% of respondents rated their working knowledge of PRT as sufficient, 40% felt confident in identifying radiation oncology emergencies or managing radiotherapy side effects, and 52% felt confident in assessing which patients to refer for radiotherapy. More than 75% agreed that were they more knowledgeable about PRT, they would be more likely to consider referral to radiation oncology, to collaborate with radiation oncologists, and to advocate for a short course of treatment based on a patient's prognosis or goals or care. Fellows who received PRT education in fellowship had significantly greater knowledge of and more favorable attitudes toward the use of radiotherapy. This difference was the greatest among fellows who had received at least five hours of PRT education. Conclusion: There is a need for PRT education in HPM fellowship. Efforts to address this need may lead to more appropriate utilization of PRT for patients with advanced cancer.