The Winkie River is one of the longest rivers in the Land of Oz, having its source in mountains of the Quadling Country. It flows close to the Tin Palace and the Scarecrow's Mansion before draining into Lake Quad. Tributaries include the Trick River and the Game River/Stiff River. Its watershed includes most of the Winkie Country, parts of the Quadling Country, and the northwest corner of the Gillikin Country.
In The Ozmapolitan of Oz, Dorothy and her companions explore the lower course of the river on foot and by boat. They follow a tributary which enters a series of underground caverns, where they rescue Melody the River Princess, a fairy whose domain is the Winkie River. She has three sisters who inhabit the Munchkin River, the Gillikin River, and the Quadling River.