Hillsboro is a city in and the county seat of Washington County, Oregon, United States. The community was founded in 1842 and was named Hillsborough in 1850; in 1876 the city was incorporated as Hillsboro. Located in the Tualatin Valley, the city is home to a number of technology companies such as microprocessor chip manufacturers and related suppliers, giving rise to the term Silicon Forest, which includes other high-tech employers in the region. Hillsboro is governed by a council-manager government consisting of a city manager and a city council headed by a mayor. Transportation modes in the city include the T.V. Highway, the Sunset Highway, and the Hillsboro Airport, with public transportation available through TriMet, including MAX Light Rail. The city has four high schools and four middle schools, and is also home to Pacific University's Health Professions Campus. Hillsboro's population was 91,611 as of the 2010 census, making it the most populous city in the county and fifth most populous in the state. The population is approximately 73% White, with those of Hispanic heritage as the largest minority group, comprising approximately 23% of the total population as of the 2010 census. Median household income was $51,737 as of the 2000 census.