Brewster as a city has a total area of about 3.2 sq. kms. and located at a height of about 815 ft. from the sea level level. Brewster is located in the County of Okanogan. The local economy of Brewster is primarily based on fruits and this led to a thriving warehousing industry in the area. Thousand orchards of fruits surrounds the countryside. Brewster is located near the confluence of Columbia and Okanogan rivers. Brewster is also quite famous for its radio telescope.