city, seat (1850) of Washington county, northwestern Oregon, U.S., adjacent to the Tualatin River. Settled in 1841, it was laid out by David Hill in 1842, called Columbia, and later renamed (by court order) for its founder. The city developed as a processing-shipping centre for wheat, truck-garden produce, and dairy products. Electronics manufacturing and specialty horticulture are the most important components of the modern economy. The city maintains the Jackson Bottom Wetlands Preserve, a 650-acre (263-hectare) wetland. Hillsboro's Old Scotch Church (1873) remains in use; its cemetery contains the graves of several well-known pioneers. Inc. 1876. Pop. (1990) 37,520; (2000) 70,186.

town, Pocahontas county, eastern West Virginia, U.S., near the Greenbrier River and nestled in the Allegheny Mountains, 25 miles (40 km) north-northeast of Lewisburg. Droop Mountain Battlefield State Park commemorates a battle fought there (November 6, 1863) during the American Civil War. Union forces led by General William Averell, after camping at Hillsboro, defeated a Confederate army under General John Echols, ending the last serious Confederate presence in the state. The author Pearl S. Buck (Buck, Pearl) was born (1892) in Hillsboro, and her birthplace, Stulting House (1858), is preserved as a museum. The town is located in a farming region (livestock, dairying, and fruit), and Calvin Price State Forest, Watoga State Park, and Cranberry Glades Botanical Area in Monongahela National Forest are nearby. Pop. (1990) 188; (2000) 243.