Objective: Although the representation of women in palliative care has improved in recent years, gender inequality still exists in editorial leadership. This study aimed to characterize gender distribution in leadership positions on the editorial boards of palliative care journals. Methods: This cross-sectional study analyzed the gender composition of editorial boards for palliative care journals indexed in the Web of Science (WoS) and the factors that affect this composition. Information on the gender of editorial board members was obtained from each journal's website. Results: A total of 1388 editorial board members from 28 palliative care journals were included in the analysis. The data analysis showed that 540 (38.9%) of the editorial board members were women, while 848 (61.1%) were men. Of the 31 editors-in-chief, only 11 (35.5%) were women. Editorial boards of journals classified as social work (OR, 5.92, 95% CI, 2.29-15.30, p < 0.001) and nursing (OR, 4.20, 95% CI, 1.73-10.17, p = 0.001) in WoS coverage were independently associated with gender diversity. There were differences in gender representation between the editorial boards of palliative care journals published in New Zealand (OR, 0.49, 95% CI, 0.29-0.80, p = 0.005), Japan (OR, 0.17, 95% CI, 0.08-0.32, p < 0.001), and those categorized under oncology in WoS coverage (OR, 0.64, 95% CI, 0.05-0.89, p = 0.009). Conclusions: Our findings demonstrated that women are underrepresented among editorial board members of palliative care journals. Additional efforts are required to broaden diversity policies in palliative care.