Southwestern Pennsylvania

The southwestern corner of Pennsylvania is the area that was the original Washington County, formed on March 28, 1781. This is the land to the west of the Monongahela River, from the West Virginia line north and west and south of the Ohio River to the Ohio line. 

Parts of the original Washington County are now Greene and portions of Beaver and Allegheny Counties. Both Pennsylvania and Virginia initially claimed this Southwestern Pennsylvania portion of the Commonwealth.

The first National Road, Route 40, came through our area, along with endless visits by the famous surveyors George Washington, Lafayette, George Rogers Clark, James Monroe, Andrew Jackson, and many other renowned people.

Join Western Pennsylvania and Pittsburgh Museums to learn more about the county's notable ancestry—and possibly your own.

Southwestern Pennsylvania

Museums

Allegheny Cemetery is the sixth oldest rural cemetery. On April 24, 1844, Allegheny Cemetery was chartered as a tax-free, non-profit organization. The Allegheny Cemetery Historical Association was established on March 17, 1980, as an educational and charitable organization.
Allow aircraft from the past to guide you through the rich history of flight. It’s an aircraft restoration and working museum specializing in WWII and Vietnam-era aircraft and artifacts.
The Dome, located on the Beaver County Community College campus, is the permanent home of the Beaver County Sports Hall of Fame.
It is Beaver County's oldest historical society (founded in 1945) and second oldest museum (founded in 1948) in the county.Artifact displayed relating to over 125 years of Beaver Falls history.
Celebrating the history of the Beaver Area's people, places, and events. Voted Best Local History Museum-Nationally.The exhibit will feature model trains traveling through a miniature landscape of America. It is a must-see for all ages.
Leechburg Area Museum and Historical Society is located in the David Leech house -- the oldest house in Leechburg.
The County’s third Courthouse, built in 1856, is an elegant structure with a large portico, stone columns, and a highly ornamented dome. The former jail is a gothic-style structure attached to the Courthouse.
Consistent with its mission statement, the Freeport Area Historical Society purchased the Valley Mills and adjacent property in 1998. The purpose is to rehabilitate the building into an operational mill, creating an atmosphere similar to that of the mid-1900s.
On April 22, 1976, the Marshall House became the first building in Armstrong County to be added to the Pennsylvania Inventory of Historic Places. In May 1976, it was also placed on the National Register of Historic Places.
The building was erected in 1909 as the Apollo headquarters for the Women’s Christian Temperance Union. It housed the first public library in Apollo and Armstrong County. The building is now the home of the Apollo Area Historical Society and its museum.
Drake's Log Cabin is a one-room log cabin that shows how early settlers lived. Items from the era are on display.
St. Stephen's Old Stone Church is a Protestant Episcopal Church located near the remains of the Bradys Bend Iron Company furnaces. In 1867, the company's trustees granted a parcel of land to each of six religious groups upon receiving $1.00.
Birthplace and childhood home of ecologist and author Rachel Carson (1907-1964), whose 1962 book Silent Spring helped to launch the environmental movement. Guided tours and classes are available.
Go back over a hundred years and take a new look at a period in Pittsburgh’s history often characterized by the extremes of late 19th-century America: fabulous wealth and grinding poverty.
In addition to being the organizing force behind saving the Braddock Carnegie Library, the Braddock’s Field Historical Society is dedicated to preserving the history surrounding General Braddock and the French and Indian War.
The Historical Society, founded in 1925, is a private, non-profit cultural organization which not only operates and maintains the Historical Museum and Local History Library, but is also involved with other historic sites thoughout the County. Among these other sites are the W.A.
A History of the Point The Fort Pitt Museum is located in a re-created eighteenth-century bastion of the famous British fort on the Forks of the Ohio River in Point State Park, Pittsburgh.
Founded in 1849, Waynesburg University (college) has a rich historical tradition. The University is proud to share its history and local history in the Paul R. Stewart Museum, located in the basement of Miller Hall on the main campus.
Soldiers & Sailors museum offers a unique look into American history. The museum explores the evolution of equipment and technology as well as the effects that military conflicts have had on society. The museum’s collections span art from the mid 1900's to cultural artifacts of today.
Committed to education, research, and wildlife conservation, the Pittsburgh Zoo & PPG Aquarium is actively involved in 25 Species Survival Plans and proudly exhibits 32 threatened or endangered species.
The Bible Lands Museum's exhibits offer glimpses into life from prehistoric times into the Middle Ages. Artifacts include many forms of pottery; objects made of stone, bone, alabaster, faience, glass, and metal; and rare examples of ancient basketry, leather, and textiles.
Hanna's Town, founded in 1773 and named for its founder Robert Hanna, was the first County Seat of Westmoreland County and the site of the first English court west of the Allegheny Mountains.
Westmoreland Museum of American Art has a significant and distinctive collection of paintings, sculptures, furniture, and more. Its collection beautifully describes the heritage of our nation and region and is designed to enrich, enlighten, and delight viewers of all ages.
The Children's Museum of Pittsburgh is reaching Great Heights with exciting exhibits and programs for the young and young-at-heart.

Organizations

The Allegheny-Kiski Valley Historical Society is a non-profit, permanent institution whose primary mission is interpreting, preserving, and celebrating our cultural, industrial, and ethnic heritage of the Allegheny and Kiskiminetas river valleys in southwestern Pennsylvania, a region embracing th
The Zelienople Historical Society maintains a museum in Passavant House of many of the original articles brought by Zelie. Growth. Early Zelienople commerce supported the local agriculture community as there was no viable means of transportation. In 1840 Zelienople was incorporated as a Borough.
Established in 1927, Butler County Historical Society's main goal was to preserve the history and culture of the county. Back in 1927 a group of locals of the county met to discuss what contiburtion they could make to portray the history of their society.  
The Indiana County Historical & Genealogical Society in western PA serves a largely rural area noted for its forest and mineral resources and its scenic beauty.
Once considered New Castle’s “best kept secret”, the word is out on the Hoyt Institute of Fine Arts and its vision to “provide the best possible arts to the greatest number of people”!
Incorporated on February 22, 1988, the Ellwood City Area Historical Society is dedicated to preserving and promoting the rich history of our community.
The Lawrence County Historical Society is located in New Castle. The home of former tin plate mogul, George Greer, it is resplendent in it's glorious woodwork and fine leaded beveled glass made by the Fry Glass Company in Rochester, Pennsylvania.