Blue Dog

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 Lake, a lake in South Dakota
 * 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), an American band formed in 1987