Winthrop is a town in Okanogan County, Washington, United States. It is east of Mazama and north of Twisp. The population of the Winthrop area was 1,916 at the 2000 census; however, the incorporated town had a population of 349. The 2010 census showed an increase to 394 within the town limits.HistoryWinthrop was officially incorporated on March 12, 1924. Native Americans were the first inhabitants of Winthrop. They lived along the banks of the Methow, Twisp, and Chewuch rivers, digging camas root, picking berries, fishing and hunting. The first white men to visit the valley were trappers in the 19th century.In the spring of 1868, placer gold was discovered in the Slate Creek District.In 1883, the lure of gold brought the first permanent white settlers, three of whom were James Ramsey, Ben Pearrygin, and Guy Waring. Waring stopped at the forks of the Chewuch and Methow rivers in 1891. His family settled into the "Castle" (now the Shafer Museum). Although Waring is the acclaimed founding father, the town is named after Theodore Winthrop, a Yale graduate, adventurer/traveler and gifted 19th century author. The town was rebuilt after a devastating fire in 1893. Waring's original Duck Brand Saloon was built in 1891. It survived the fire and is now Winthrop's Town Hall.
