Sedro-Woolley is a city in Skagit County, Washington, United States. The population was 10,540 at the 2010 census. It is included in the Mount Vernon - Anacortes, Washington Metropolitan Statistical Area.HistoryOfficially incorporated on December 19, 1898, Sedro-Woolley was formed from neighboring rival towns known as Bug and Woolley in Skagit County, northwestern Washington, 25mi inland from the Puget Sound, 40mi south of the border with Canada and 65mi north of Seattle.Four British bachelors, led by David Batey, homesteaded the area in 1878, the time logjam obstructions were cleared downriver at the site of Mount Vernon. In 1884–85, Batey built a store and home for the arrival of the Mortimer Cook family from Santa Barbara, California where Cook had been mayor for two terms. Cook intended to name his new Pacific Northwest town Bug due to the number of mosquitos present, but his wife protested along with a handful of local wives. Cook was already the namesake for the town Cook's Ferry on the Thompson River in British Columbia. With "Bug" being so unpopular, Cook derived a town name from Spanish; knowing "cedro" was the word for cedar, he replaced one letter to make the name unique, settling on "Sedro".
