THE HARFORD COUNTY LAND BRIEF
Land in the
Piedmont Uplands setting.
Harford County has 437.1 square miles of land in Maryland. 3 mapped landscape regions meet across Harford County: Piedmont Uplands, Chesapeake-Pamlico Lowlands and Tidal Marshes, Chesapeake Rolling Coastal Plain.
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 ↗ · Regional mapping across the county footprint
Where the landscape changes
Harford County intersects 3 mapped regional units. The largest mapped shares are:
- Piedmont Uplands75.3%
- Chesapeake-Pamlico Lowlands and Tidal Marshes17.6%
- Chesapeake Rolling Coastal Plain7%
Middle Atlantic Coastal Plain in Harford County
Low coastal plains contain terraces, estuaries, marshes and barrier islands. Unconsolidated sediments underlie this varied coastal setting, with forest patterns changing near streams and low-lying areas.
Read the regional source ↗Southeastern Plains in Harford County
Irregular plains of sand, silt and clay support a mix of pine and hardwood landscapes. The region has more relief than the lower coastal plain, with generally gentle stream gradients.
Read the regional source ↗Finding your parcel within Harford County
The atlas lists 16 cities, towns, townships, and Census communities associated with Harford County, including Bel Air South, Edgewood, Bel Air North. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Harford County by land and water
The Census records 89.5 square miles of water within Harford County, or 17% of its total area. That share is close to Harford County’s 17%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Harford County has 20.6 times the land area of nearby Bel Air South CDP (21.3 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Baltimore County, Cecil County, Kent County within Maryland. A tract near one of these lines should be matched to the county identifier on its own records.

