Sedro-Woolley is a city in Skagit County, Washington, United States. It is part of the Mount Vernon–Anacortes, Washington Metropolitan Statistical Area and had a population of 10,540 at the 2010 census. The city is home to North Cascades National Park.
Officially incorporated on December 19, 1898, Sedro-Woolley was formed from neighboring rival towns known as Bug and Woolley in Skagit County, northwestern Washington, 25 miles (40 km) inland from the Puget Sound, 40 miles (64 km) south of the border with Canada and 65 miles (105 km) 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 other 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".
Sedro, on the northern banks of the Skagit River, proved susceptible to floods. In 1889, Northern Pacific Railway developer Nelson Bennett began laying track from the town of Fairhaven, 25 miles (40 km) northwest on Bellingham Bay, and real estate developer Norman R. Kelley platted a new town of Sedro on high ground a mile northwest of Cook's site. The Fairhaven and Southern Railroad arrived in Sedro on Christmas Eve 1889, in time for Bennett to receive a performance bonus from the towns at both ends, and a month after Washington became the 42nd state in the Union.
Within months, two more railroads crossed the F&S road bed a half mile north of new Sedro, forming a triangle where 11 trains eventually arrived daily.