Dog Star (disambiguation)
The Dog Star is a nickname for Sirius, a star in the constellation Canis Major (Greater Dog).
Dog Star or Dogstar may also refer to:

Art, entertainment, and media
Dogstar (band), a rock group including Keanu Reeves
"Dog Star" (short story), a short story by Arthur C. Clarke
Dogstar (TV series), a 2006 animated Australian TV series
Dog Star, a fictional bar in The Returned (U.S. TV series)
"Dogstar", a song by Hybrid from the 2006 album I Choose Noise
"Dog Star", a song by Klaatu from the 1980 album Endangered Species
The Dog Star, a 1950 novel by Donald Windham
The Dog Stars, a 2012 novel by Peter Heller