THE GREAT FALLS LAND BRIEF
Land in the
Piedmont Uplands setting.
Great Falls CDP has 25.4 square miles of land in Fairfax County. Its Census reference point is in Piedmont 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
Great Falls and Fairfax County
Great Falls is associated with Fairfax 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.
Great Falls by land and water
The Census records 0.24 square miles of water within Great Falls, or 0.9% of its total area. It is 2.9 percentage points lower than the 3.8% recorded for Fairfax County. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Great Falls CDP has 42.5 times the land area of nearby Great Falls Crossing CDP (0.6 square miles). These areas describe boundaries, not comparable property prices.

