Pennsylvania's 27th congressional district

Upper St. Clair is a township with home rule status in southern Allegheny County, Pennsylvania, United States, located approximately 8 miles (13 km) south of Downtown Pittsburgh. It is known for being an affluent suburb with a nationally recognized school district. As of the 2010 census, the township population was 19,229. Around 9% of the township's area is dedicated to 14 parks and multiple fields, totaling approximately 733 acres. The township has six borders with neighboring communities, including South Fayette Township to the west, Bridgeville to the northwest, Scott Township and Mt. Lebanon to the north, Bethel Park to the east, and Peters Township in Washington County to the south.

The Upper St Clair School District is a public school district serving the Pittsburgh suburb of Upper St. Clair Township, Pennsylvania. The district encompasses approximately 10 square miles. Upper Saint Clair School District features three elementary schools for grades K–4: Albert F. Baker Elementary, Dwight D. Eisenhower Elementary, and Carl R. Streams Elementary. The school district also includes two middle schools, Fort Couch Middle School and Boyce Middle School. Boyce Middle School contains both 5th- and 6th-level students. Fort Couch Middle School contains grades 7th and 8th grades, and is the oldest running school of the school district. According to 2000 census data, it serves a resident population of 20,053.

Upper St. Clair High School (USCHS) is a public secondary school in Upper St. Clair, Pennsylvania and the sole high school within the township's namesake school district. Serving students in grades 9–12, USCHS is one of three secondary schools in Pennsylvania to be recognized as a Blue Ribbon School three times.

The Fulton Log House in Upper St. Clair Township, Pennsylvania, was built circa 1830. The log house was listed on the National Register of Historic Places on December 6, 1975.Alexander Gilfillan settled in Upper St. Clair Township in the late 1760s and eventually owned 413 acres. About 1830, he or his son, John, built houses for his workers including four or five log houses, with only one surviving to the present. This house remained in the Gilfillan Family until 1899. James E. and Emily Fulton bought the house in 1923 as a summer home. Their son James Grove Fulton was a lifelong bachelor and served in the U.S. Congress from 1945 to 1971. His estate sold the house to Upper St. Clair Township in 1972. The 1830 Log House Association restored the house and now uses it for educational purposes.

TWA Flight 15A (TWA 15A), a Douglas DC-2 operated by Transcontinental and Western Air, crashed into a gully in Clifton, Pennsylvania, now Upper Saint Clair, a suburb approximately 7 miles (11 km) south of Pittsburgh. The crash occurred at approximately 6:40 p.m. Eastern Standard Time on March 25, 1937, killing all 13 passengers and crew members. Flight 15A was a regularly scheduled flight from Newark, New Jersey to Pittsburgh, Pennsylvania via Camden, New Jersey. This accident marked the third fatal crash of a commercial airliner in the Pittsburgh area within a single year's time. On April 7, 1936 TWA Flight 1, also a DC-2, crashed into Cheat Mountain south-east of Pittsburgh near Uniontown with 12 fatalities. On September 5, 1936 a Stinson 6000 tri-motor operating under the name Skyways crashed near Pittsburgh's Allegheny County airport while on a sightseeing flight, killing 9 of 10 onboard, including the pilot. Spared was the earliest known sole survivor of a commercial aviation accident.

Gilfillan Farm is located at the junction of Washington (U.S. Route 19) and Orr roads in Upper St. Clair Township, Allegheny County, Pennsylvania, United States. It is a working farm whose current form dates to the mid-19th century. The farm's main house shows the transition from the Greek Revival style to the Victorian modes that became dominant later in the century. It remained a farm in the hands of the same family until 2001, even as the area around it has become a suburb of nearby Pittsburgh. In 1979 it was listed on the National Register of Historic Places, and is currently owned by the township's historical society.

Mayview State Hospital was a psychiatric hospital, originally known as Marshalsea Poor Farm, located in South Fayette Township near Bridgeville, Pennsylvania. It spanned 335 acres (136 ha) and had 39 buildings, 12 of which were used for patient care and hospital administration. It had a staff count of approximately 502 as of August 2007, and an operating budget of $63 million per year. It was demolished in 2016.

St. Clair Township, Allegheny County, Pennsylvania, was one of the original townships created with the incorporation of Allegheny County in 1788. The township was named after Arthur St. Clair, an American Revolutionary War general and president of the Continental Congress in 1787. The township extended from the Ohio and Monongahela rivers to the southern county line. It was bounded on the west by Chartiers Creek and on the east partially by Streets Run. The township was subsequently divided between the northern part, Lower St. Clair Township, and the southern part, Upper St. Clair Township. The "upper" and "lower" referred to the elevation, as Lower St. Clair bordered on the river, the lowest elevation, and Upper St. Clair extended into the South Hills of Pittsburgh. The original Lower St. Clair Township consisted of the present-day neighborhoods of the City of Pittsburgh south of the Monongahela and Ohio, and all or parts of Green Tree, Carnegie, Baldwin, Bridgeville, Dormont, Mount Lebanon and other boroughs and townships in the South Hills. The township was subdivided several times, and today exists only as the neighborhood of St. Clair in the City of Pittsburgh. Upper St. Clair Township, subdivided many times, still exists in the South Hills of Pittsburgh.

South Hills Village is a two-level shopping mall that is located in the Pittsburgh suburbs of Bethel Park and Upper St. Clair Township, Pennsylvania, United States. The mall features Macy's, Target, Dick's Sporting Goods, Barnes & Noble and a future Von Maur store in a space formerly occupied by Sears.

Boyce is an unincorporated community in South Fayette and Upper St. Clair townships, Allegheny County, Pennsylvania, United States. Boyce is located along Chartiers Run, 10.5 miles (16.9 km) southwest of downtown Pittsburgh.

South Hills Village is a station on Pittsburgh Regional Transit's light rail network. It is the southern terminus of both the Red and Blue lines. Port Authority's switching yard and shops are located just west of the station. The station is located in Bethel Park, PA and is adjacent to the South Hills Village shopping complex. A large 7 floor, 2200 space parking garage was completed in 2004 at a cost of $21.6 million ($33.5 million in 2022 adjusted for inflation) and is located on site for commuters traveling from Pittsburgh's South Hills suburbs. The station itself is located at the center-back (south side) of the first floor of the garage. In addition to serving as a commuter stop, the site also handles much reverse flow traffic of shoppers from the city and more northerly suburbs.

Coal Run is a 4.37 mi (7.03 km) long 2nd order tributary to Chartiers Creek in Allegheny and Washington Counties, Pennsylvania.