: Health disparities among transgender and gender-diverse individuals are partly attributed to the limited knowledge and preparedness of healthcare providers. This study aims to assess the level of knowledge of transgender health among residents in obstetrics and gynecology and family medicine. : A multicenter, cross-sectional study was conducted with obstetrics and gynecology (OBGYN) and family medicine (FM) residents from two different centers. Data were collected using a 21-item questionnaire. The questionnaire assessed participants' demographic information, knowledge of sexual orientation and gender identity, clinical and anatomical effects of gender-affirming hormone therapy, knowledge of gender-affirming surgery, and knowledge of risk-based screening for TGD individuals. : The study, which included 85 residents (62 FM, 23 OBGYN), found that 76.6% of respondents indicated that SOGI should be routinely assessed. However, 68.3% of the participants reported inadequate knowledge regarding the clinical implications of gender-affirming hormone therapy, and 74.1% reported insufficient knowledge about gender-affirming surgeries. Furthermore, 62.4% of the participants indicated that they had not received any health education specifically tailored to address the needs of transgender individuals. Only 23.5% reported receiving training during their residency programs. Notably, 84.7% of the participants expressed a desire for formal education in this area. : FM and OBGYN residents have significant knowledge gaps regarding TGD health. The integration of TGD health topics into the curricula of medical schools and residency programs is needed to improve access to healthcare for individuals with TGD.