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We would like to welcome you to our official web site and invite you to take advantage of our internet services from the convenience of your home or work, twenty-four hours a day, seven days a week. Our borough government strives to serve the needs of our citizens. We would like to build on the strengths of our community, which are made possible by the people that call Mount Oliver their home.

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A Brief History

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Mount Oliver is a borough in Allegheny County, Pennsylvania, United States. It is a largely residential area situated atop a crest about 3 miles (5 km) west of the Monongahela River. The borough is surrounded entirely by the city of Pittsburgh.

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It is named for Oliver Ormsby, son of John Ormsby, who held the original land grant for the area from George III.

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Mount Oliver celebrated its centennial in 1992.  With over 100 years of history as a municipality, Mount Oliver has maintained many of the values that were key to its founding in 1892. These values actually began as far back as 1769 when John Ormsby, an officer under the command of General Forbes, was granted 249 acres in an area located in the south hills along the banks of the Monongahela River.  John Ormsby’s family can be traced back to 1040 where his ancestors served in the court of Queen Elizabeth of England.  The Ormsby family became known as the most famous of all pioneering families, and is documented as the oldest family of distinguished lineage in all of Pittsburgh.

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Through the 1800’s, this land was partitioned and sold and the population grew rapidly.  This growth continued through the century to the point in 1892, when the Township of Upper St. Clair, which Mount Oliver was a part of, could no longer meet the community’s needs.  The citizens of the area developed and circulated petitions to incorporate the area into a borough.  The area described was bounded to the north by Arlington Avenue to St. Peter’s Cemetery and the southern boundary reached Ottillia and Wade Streets to the intersection of Margaret Street and Brownsville Road.  After the petition reached over 140 signatures, the proposal was passed by the Quarter Courts and Mount Oliver officially became a borough by the end of 1892.

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We are looking forward to facilitate planning and preservation to improve Mount Oliver Borough. We welcome Mount Oliver residents to join us in this effort. Our history is our future! Preserving our historic sites will also preserve the character of our town, showcasing its contributions to Western Pennsylvania.

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To explore Mount Oliver's history is to experience the beginning of our country. Join us and help document the Mount Oliver story for future generations to learn from and to claim the pride that comes from knowing about the place where you live.

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