Quarai is a
Brazilian municipality located near the border with
Uruguay on the
Rio Quaraí. The population is 23,579 (2015 est.) in an area of 3,147.63 km², making it one of the largest municipalities in the state. Its elevation is 112 m. It is located 590 km west of the state capital of
Porto Alegre, northeast of
Montevideo, Uruguay and southeast of
Alegrete.