D. Train (sometimes written as D Train, D-Train or "D" Train) was an American R&B duo, who scored several significant hits on both the Billboard Dance and R&B charts during the first half of the 1980s.

The project was a collaborative effort between the band's namesake James "D. Train" Williams, who was featured as the lead vocalist and songwriter, and Hubert Eaves III, a keyboardist and producer who performed the instrumentation on the recordings. Hailing from Brooklyn, New York, Williams himself was a R&B/dance producer as well. He and Eaves met during high school and began performing together. Eaves would spend most of the 1970s as a member of the R&B band Mtume. However, by the 1980s, he and Williams had teamed up again. The group named themselves "D. Train" after a nickname Williams had acquired as a football player in high school.