Allegheny County is a county in Pennsylvania, United States. It is located in Southwestern Pennsylvania. As of the 2020 census, the population was 1,250,578, making it the state's second-most populous county, after Philadelphia County. Its county seat is Pittsburgh, Pennsylvania's second most populous city. Allegheny County is part of the Pittsburgh, PA metropolitan statistical area and the Pittsburgh media market.
Washington County is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 209,349. Its county seat is Washington.
Elizabeth is a borough in Allegheny County, Pennsylvania, United States, on the east bank of the Monongahela River, where Pennsylvania Route 51 crosses, 15 miles (24 km) upstream (south) of Pittsburgh and close to the county line. The population was 1,398 at the 2020 census. The borough of Elizabeth is entirely contained within the 15037 USPS ZIP code. The local school district is the Elizabeth Forward School District. The borough is home to neighborhoods Walker Heights and Town Hill. Elizabeth Borough is the birthplace of Town Hill Hockey established in 1978.
Jefferson Hills is a borough that is located in Allegheny County, Pennsylvania, United States. Part of the West Jefferson Hills School District, Jefferson Hills was created as Jefferson Township. Incorporated on January 22, 1828, it was named after Thomas Jefferson. Before 1998, the borough was known as Jefferson.
Monongahela, referred to locally as Mon City, is a third class city in Washington County, Pennsylvania, United States. The population was 4,149 at the 2020 census. It is part of the Pittsburgh metropolitan area, about 17 miles (27 km) south of Pittsburgh proper.
Yohogania County was created by the new state of Virginia in 1776, in an area long disputed between Virginia and Pennsylvania. The county ceased to exist after the border dispute between the two states was resolved in the 1780s. Thus, it is sometimes referred to as a "lost county," although 1.5 million people live within the territory it once claimed, which encompasses two entire counties and parts of four others in two states.
The District of West Augusta was a short-lived (1774–76) historical region of Colonial Virginia that encompassed much of what is now northern West Virginia and southwestern Pennsylvania.
This is a list of properties and districts listed on the National Register of Historic Places in Pennsylvania. As of 2015, there are over 3,000 listed sites in Pennsylvania. All 67 counties in Pennsylvania have listings on the National Register.
The Allegheny County Courthouse in downtown Pittsburgh, Pennsylvania, is part of a complex designed by H. H. Richardson. The buildings are considered among the finest examples of the Romanesque Revival style for which Richardson is well known.
This is a list of the National Register of Historic Places listings in Allegheny County, Pennsylvania.
The David Bradford House is a historic house museum at 175 South Main Street in Washington, Pennsylvania. Completed in 1788, it was the home of David Bradford, a leader of the Whiskey Rebellion. It has both architectural and historic importance, and was designated a National Historic Landmark in 1983. It is open weekly between April and November, or by appointment.
The Edward G. Acheson House is a historic house at 908 West Main St. in Monongahela, Washington County, Pennsylvania, United States. Probably built about 1870, it is notable as the home of Edward G. Acheson (1856-1931), the inventor of carborundum, and as the likely site of its invention. It was designated a National Historic Landmark in 1976.
Woodville, also known as the Neville House or John Neville House, is a house which is located on Washington Pike south of Heidelberg, Pennsylvania. It is significant for its association with John Neville, a tax collector whose other house was burned in the Whiskey Rebellion in 1794. The oldest portion of the house dates to 1775, with a main section built a decade later.
The following properties are listed on the National Register of Historic Places in Pittsburgh, Pennsylvania.
Oliver Miller Homestead, site of the James Miller House, is a public museum that commemorates pioneer settlers of Western Pennsylvania. It is located in Allegheny County, Pennsylvania's South Park 10 miles (16 km) south of downtown Pittsburgh in South Park Township.
Fort Gaddis is the oldest known building in Fayette County, Pennsylvania and the second oldest log cabin in Western Pennsylvania. It is located 300 yards (270 m) east of old U.S. Route 119, near the Route 857 intersection in South Union Township, Fayette County, Pennsylvania. Fort Gaddis was built about 1769-74 by Colonel Thomas Gaddis who was in charge of the defense of the region, and his home was probably designated as a site for community meetings and shelter in times of emergency, hence the term "Fort Gaddis," probably a 19th-century appellation. It is a 1 1/2-story, 1-room log structure measuring 26 feet long and 20 feet wide.
Mingo Creek Presbyterian Church and Churchyard is a church and historic location in Washington County, Pennsylvania. It is located at the junction of Pennsylvania Route 88 and Mingo Church Road in Union Township, Washington County, Pennsylvania, near Courtney, Pennsylvania. It is a member of the Washington Presbytery.
The Adams County Courthouse is located in Gettysburg, Pennsylvania. It was added to the National Register of Historic Places on October 1, 1974.
