Blacktail (also known as Black Tail) is a ghost town in Lawrence County, South Dakota, United States.
Blacktail was named for the black-tailed deer spotted by a settler near the town site. Blacktail was an early mining camp in which some of the Homestake Mine's mills operated. While the town flourished for a while, it eventually became a ghost town. It was located between Central City and Gayville, and in the area where Blacktail Gulch and Bobtail Gulch meet. The site has an elevation of .