Widmer Brothers is a brewery founded in 1984 in Portland, Oregon, by brothers Kurt and Robert Widmer. It is part of the Craft Brew Alliance, Inc., the 12th largest brewing company in the United States in 2017.

Craft Brew Alliance is a beer brewing company that originally was composed of five beer and cider brands:Redhook Ale Brewery, founded by Gordon Bowker and Paul Shipman in 1981 in Seattle, Washington; Widmer Brothers Brewery, founded by brothers Kurt and Rob Widmer in 1984 in Portland, Oregon; Kona Brewing Company, founded by father and son team Cameron Healy and Spoon Khalsa in 1994 in Kona, Hawaii; Omission Beer, developed internally in 2012 in Portland, Oregon; and Square Mile Cider, launched in 2013.