Among younger men who have sex with men (MSM), the incidence of HIV is rising nationally. Of the 281 persons who entered into care at a large HIV clinic in the southeastern United States in 2010 to 2012, 78 (27.8%) were <25 years old at the time of diagnosis. Those in the younger group were more likely than those aged ≥25 to be black (59.0% versus 37.4%), MSM (78.2% versus 55.2%), and to have a longer median time from diagnosis to entry into care (71 versus 53 days; P <.05 each). In adjusted survival analysis, persons of black race were less likely to enter care after diagnosis than those of nonblack race (hazard ratio = 0.75, P =.02). Young MSM represent an important target population for prevention and HIV testing interventions, and there is a need to shorten the time from diagnosis to linkage to care, particularly in persons aged <25 and of black race.