Recent evidence suggests that, when compared to their cisgender counterparts, transgender youth exhibit more unsafe sexual behavior that may elevate their risk for sexually transmitted infections. The aim of this study was to better understand what transgender youth know about oral sex, related consequences, and mechanisms of protection and where they obtained this information. The findings can be helpful in preparing oral health providers to play a role in meeting this public health need. The study took place at a U.S. academic pediatric medical center in 2017. Participants were recruited at a Transgender Research Day and during Transgender Clinic sessions. English-speaking transgender adolescents ages 14 to 24 were invited to participate in a previously validated survey about their knowledge and behaviors related to oral sex. Of the 138 transgender youth invited to participate, 57 completed the surveys, for a 41% response rate. Most respondents reported feeling they understood the necessity of protection and consequences of oral sex but did not use protection. Over half of the participants (58%) said they had not had a physician, dentist, or parent speak to them about oral sex. Given the lack of standardized, evidence-based sex education, it is imperative that adolescents, particularly in highly vulnerable populations like transgender youth, receive accurate information about oral sexual contact. Dental schools should prepare future practitioners to address these issues with youth using a culturally competent, evidence-based approach.