Covington is a city in King County, Washington, United States. The population was 17,575 at the time of the 2010 census. Prior to the 2010 census, Covington was counted as part of Covington-Sawyer-Wilderness CDP.
The area presently known as Covington was originally known as Jenkins Prairie. Between 1899 and 1900 the Northern Pacific Railway built a cut-off between Auburn, Washington and Kanaskat, Washington, improving the company's primary east-west route across Stampede Pass. Richard Covington, a surveyor for the Northern Pacific Railroad worked out of Fort Vancouver establishing the line through western Washington to complete the line from St Paul, Minnesota, to Auburn. According to the NP's construction records at the University of Montana's K. Ross Toole Archives, the primary contractors were banker Horace C. Henry of Seattle, Washington, and long-time railroad contractor Nelson Bennett of Tacoma, Washington, the NP's prime contractor for Stampede Tunnel, which he completed in 1888. The project engineer in Auburn was George Allen Kyle. The NP's principal assistant engineer in Tacoma, overseeing both Kyle and Bennett's work, was Charles S. Bihler.
As of the census of 2010, there were 17,575 people, 5,817 households, and 4,649 families residing in the city. The population density was 2,999.1 inhabitants per square mile (1,158.0/km²). There were 6,081 housing units at an average density of 1,037.7 per square mile (400.7/km²). The racial makeup of the city was 76.1% White, 4.2% African American, 0.8% Native American, 8.5% Asian, 0.6% Pacific Islander, 3.9% from other races, and 5.8% from two or more races. Hispanic or Latino of any race were 9.3% of the population.
There were 5,817 households of which 46.5% had children under the age of 18 living with them, 63.2% were married couples living together, 11.0% had a female householder with no husband present, 5.7% had a male householder with no wife present, and 20.1% were non-families. 14.4% of all households were made up of individuals and 4.1% had someone living alone who was 65 years of age or older. The average household size was 3.02 and the average family size was 3.31.
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