Quincy is a city in Grant County, Washington, United States. It is situated east of the Columbia River on State Route 28 and north of Interstate 90. The population was 7,543 at the 2020 census. Quincy is one of the closest cities to The Gorge Amphitheatre.
History
thumb|Historic Reiman-Simmons House at the Quincy Valley Museum
Geologic history
Quincy lies atop a part of the Columbia River Basalt Group, which is overlain by Pleistocene outburst flood deposits. The Missoula Floods had one of their outlets at Trinidad, close to Quincy, and another near Ancient Lakes, which includes the Ancient Lakes of the Columbia Valley AVA. Glacial erratics carried from as far away as Montana can be found nearby. The area also has an abundance of rimrock.
Great Northern Railway
Quincy was founded as a railroad camp during construction of the Great Northern Railway in 1892, and was incorporated on March 27, 1907. It was named after Quincy, Illinois.
Grand Coulee Dam
The arrival of the water from the Grand Coulee Dam in 1952 changed the town.
Geography
According to the United States Census Bureau, the city has a total area of , of which, is land and is water.
Climate
Quincy has a cold desert climate (BSk) according to the Köppen climate classification system.