THE SEWICKLEY LAND BRIEF
Land in the
Monongahela Transition Zone setting.
Sewickley township has 26.8 square miles of land in Westmoreland County. Its Census reference point is in Monongahela Transition Zone, within Western Allegheny Plateau.
Rounded wooded hills and intervening valleys form an unglaciated plateau landscape. Valley floors contain much of the region's open land, contrasting with its more forested slopes.
Regional context: Western Allegheny Plateau ↗ · Classification at the Census reference point
Sewickley and Westmoreland County
Sewickley is associated with Westmoreland County in the Census boundary data. Start with the parcel’s tax bill to match the property to that jurisdiction, then confirm which government handles its land use.
Sewickley by land and water
The Census records 0.23 square miles of water within Sewickley, or 0.9% of its total area. That share is close to Westmoreland County’s 0.8%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Sewickley township has 110.1 times the land area of nearby Herminie CDP (0.24 square miles). These areas describe boundaries, not comparable property prices.

