THE PRINCETON LAND BRIEF
Land in the
Triassic Lowlands setting.
Princeton has 17.9 square miles of land in Mercer County. Its Census reference point is in Triassic Lowlands, 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
Princeton and Mercer County
Princeton is associated with Mercer 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.
Princeton by land and water
The Census records 0.47 square miles of water within Princeton, or 2.5% of its total area. It is 0.6 percentage points higher than the 1.9% recorded for Mercer County. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Princeton has 9.6 times the land area of nearby Kingston CDP (1.87 square miles). These areas describe boundaries, not comparable property prices.

