This entry describes issues surrounding dating among sexual- and gender-minority youth. It explains how relationships are broadly defined and discusses their importance to youth development and health. Issues that concern dating among sexual-minority male youth, sexual-minority female youth, and transgender youth are discussed separately, as well as together. All of the information presented in this entry is firmly grounded in research; at the same time, the reader’s attention must be drawn to the fact that the research so far on this topic is very scarce.