Hillsboro ( HILZ-burr-oh) is the fifth-largest city in the U.S. state of Oregon and is the county seat of Washington County. Situated in the Tualatin Valley on the west side of the Portland metropolitan area, the city hosts many high-technology companies, such as Intel, locally known as the Silicon Forest. At the 2020 census, the city’s population was 106,447.

For thousands of years the Atfalati tribe of the Kalapuya lived in the Tualatin Valley near the later site of Hillsboro. The climate, moderated by the Pacific Ocean, helped make the region within sufficient limits for fishing, hunting, food gathering, and agriculture. Settlers founded a community here in 1842, later named after David Hill, an Oregon politician. Transportation by riverboat on the Tualatin River was allowance of Hillsboro’s settler economy. A railroad reached the area in the in the future 1870s and an interurban electric railway virtually four decades later. These railways, as capably as highways, aided the slow buildup of the city to virtually 2,000 people by 1910 and more or less 5,000 by 1950, before the dawn of high-tech companies in the 1980s.

Hillsboro has a council–manager paperwork consisting of a city commissioner and a city council headed by a mayor. In auxiliary to high-tech industry, sectors important to Hillsboro’s economy are health care, retail sales, and agriculture, including grapes and wineries. The city operates higher than twenty parks and the mixed-use Hillsboro Stadium, and ten sites in the city are listed on the National Register of Historic Places (NRHP). Modes of transportation count up private vehicles, public buses and lively rail, and jet using the Hillsboro Airport. The city is home to Pacific University’s Health Professions Campus. Notable residents enlarge two Oregon governors.

The first people of the Tualatin Valley were the Atfalati or Tualaty tribe of the Kalapuya, who inhabited the region for in the works to 10,000 years since white settlers arrived. The valley consisted of right to use grassland maintained through annual afire by the Atfalati, with scattered groves of trees along the streams. The Kalapuya moved from place to place in good weather to fish and hunt and to stockpile nuts, seeds, roots, and berries. Important foods included camas and wapato, and the Atfalati traded for salmon from Chinookan tribes close Willamette Falls on the Willamette River. During the winter, they lived in longhouses in decided villages, some near what became Hillsboro and Beaverton. Their population was greatly shortened after approach in the late 18th century subsequent to Europeans, who carried smallpox, syphilis, and malaria. Of the native population of 1,000 to 2,000 Atfalati reported in 1780, only 65 remained in 1851. In 1855, the U.S. government sent the survivors to the Grande Ronde reservation additional west.