The Giant Schnauzer or Riesenschnauzer is a German breed of dog of Schnauzer type. It is larger than the other two Schnauzer breeds, the Standard Schnauzer and the Miniature Schnauzer. Originally bred to assist on farms by driving livestock to market and guarding the farmer's property, the breed eventually moved into the city, where it worked guarding breweries, butchers' shops, stockyards and factories. It was unknown outside Bavaria until it became popular as a military dog during World War I and World War II. It has a dense coarse coat that protects it from the weather and from vermin. There are three color varieties: pepper and salt, pure black with black undercoat, and black and silver. Where legal, it is shown with cropped ears and docked tails. Like other schnauzers, it has a distinct beard and eyebrows. Today, the Giant Schnauzer participates in numerous dog sports, including Schutzhund. Another sport that the dog excels in is that of nosework. Due to its alert nature, the dog is also used in police work.

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