The Brown Swiss or American Brown Swiss is an American breed of dairy cattle. It derives from the traditional triple-purpose Braunvieh of the Alpine region of Europe, but has diverged substantially from it. Milk yield was measured in 2013 at 10231 kg per year; the milk has about 4% butterfat and 3.5% protein and is suitable for making cheese.
In the twentieth century the Brown Swiss became a world breed, with a global population estimated in 1990 at seven million head. It has been much used for cross-breeding and has influenced a number of modern breeds.