Coordinates: 40°28′00″N 79°55′18″W / 40.46667°N 79.92167°W / 40.46667; -79.92167

Pittsburgh Theological Seminary, founded in 1794, is a graduate theological institution associated with the Presbyterian Church USA. It is located in the East Liberty neighborhood of Pittsburgh, Pennsylvania, USA and houses one of the larger theological libraries in the nation. It is among the more conservative-leaning seminaries in the mainline Presbyterian church, both in faculty and student body.

The consolidation of two previously separate institutions, Pittsburgh-Xenia Theological Seminary (United Presbyterian Church of North America) and Western Theological Seminary (Presbyterian Church USA), led to the formation of Pittsburgh Theological Seminary in 1959.

Pittsburgh ( /ˈpɪtsbərɡ/, PITS-burg) is the second largest city in the U.S. Commonwealth of Pennsylvania and the county seat of Allegheny County. Regionally, it anchors the largest urban area of both Appalachia and the Ohio River Valley. Nationally, it is the 22nd largest urban area in the United States. The population of the city in 2010 was 305,704, while that of the seven-county metropolitan area stood at 2,356,285.Downtown Pittsburgh retains substantial economic influence, ranking at 25th in the nation for jobs within the urban core and 6th in job density. The characteristic shape of Pittsburgh's central business district is a triangular tract carved by the confluence of the Allegheny and Monongahela rivers, which form the Ohio River. The city features 151 high-rise buildings, 446 bridges, two inclined railways, and a pre-revolutionary fortification. Pittsburgh is known colloquially as "the City of Bridges" and "the Steel City" for its many bridges and former steel manufacturing base.

A seminary, theological college, or divinity school is an institution of secondary or post-secondary education for educating students (sometimes called seminarians) in theology, generally to prepare them for ordination as clergy or for other ministry. The English word is taken from the Latin seminarium, translated as seed-bed, an image taken from the Council of Trent document Cum adolescentium aetas which called for the first modern seminaries. As such, in the West the term usually refers to Roman Catholic educational institutes, but has widened to include other Christian denominations and American Jewish institutions.

The establishment of modern seminaries resulted from Roman Catholic reforms of the Counter-Reformation after the Council of Trent. The Tridentine seminaries placed great emphasis on personal discipline as well as the teaching of philosophy as a preparation for theology.

Some seminaries elect to acquire accreditation. In North America, four entities that accredit religious schools in particular are recognized by the United States Department of Education and the Council for Higher Education Accreditation: Association of Advanced Rabbinical and Talmudic Schools, Association for Biblical Higher Education, Association of Theological Schools in the United States and Canada, and Transnational Association of Christian Colleges and Schools.