Blue Dog may refer to:

• The Blue Dog Coalition, a group of conservative Democratic Party members of the United States House of Representatives
• Blue Dog, a painting and a featured icon in various works by George Rodrigue
• Blue Dog Records was a London based independent record label linked to the Barfly club
• The Blue Dog, one of the "blue" public houses and inns in Grantham
• The Blue Dogs (band) is an "Americana-tinged" contemporary rock band from Charleston, SC, USA.

See also

• Blue's Clues, a television show with a dog named Blue
• Blue is a general description for the color of some dogs' coats
• Blue Dog Rescue, a volunteer organization whose purpose is to end the needless killing of homeless dogs in Austin, Texas