THE LONDONDERRY LAND BRIEF
Land in the
Trap Rock and Conglomerate Uplands setting.
Londonderry township has 22.8 square miles of land in Dauphin County. Its Census reference point is in Trap Rock and Conglomerate Uplands, within Northern Piedmont.
Rounded low hills, open valleys and irregular plains form a transition between Appalachian highlands and the coastal plain. The underlying geology mixes metamorphic, igneous and sedimentary rocks.
Regional context: Northern Piedmont ↗ · Classification at the Census reference point
Londonderry and Dauphin County
Londonderry is associated with Dauphin 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.
Londonderry by land and water
The Census records 4.15 square miles of water within Londonderry, or 15.4% of its total area. It is 9.5 percentage points higher than the 6% recorded for Dauphin County. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Londonderry township has 71.6 times the land area of nearby Royalton borough (0.32 square miles). These areas describe boundaries, not comparable property prices.

