Burien ( /bjʊəriən/ bewr-ee-ən) is a city in King County, Washington, United States, located south of Seattle. As of the 2010 Census, Burien's population is 33,313, which is a 2.9% increase since incorporation. Annexation in 2011 has increased the cities population to about 45,000.
European settlement in the Burien area dates to 1870, when Mike Kelly walked up a hill from the Seattle area. When he emerged from the trees he said, "This is truly a sunny dale." Today, a few long-time residents still refer to the Burien area as Sunnydale. He claimed a 160-acre (0.6 km2) plot of land and built a house and a farm.
Ten years later, Gottlieb Von Boorian, a German immigrant, arrived in Sunnydale, which was only a community of trails and small houses without roads or commercial buildings. Von Boorian built a cabin on the southeast corner of Lake Burien and reportedly formed the community into a town bearing his name (misspelled over the years). A real estate office was built and soon attracted large numbers of new residents to Burien.