THE HOWARD COUNTY LAND BRIEF
Land in the
Piedmont Uplands setting.
Howard County has 251 square miles of land in Maryland. 2 mapped landscape regions meet across Howard County: Piedmont Uplands, 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
Howard County intersects 2 mapped regional units. The largest mapped shares are:
- Piedmont Uplands90%
- Chesapeake Rolling Coastal Plain10%
Southeastern Plains in Howard 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 Howard County
The atlas lists 11 cities, towns, townships, and Census communities associated with Howard County, including Columbia, Ellicott City, Ilchester. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Howard County by land and water
The Census records 2.45 square miles of water within Howard County, or 1% of its total area. That share is close to Howard County’s 1%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Howard County has 104.3 times the land area of nearby Highland CDP (2.41 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Anne Arundel County, Baltimore County, Carroll County, Frederick County, Montgomery County, Prince George's County within Maryland. A tract near one of these lines should be matched to the county identifier on its own records.

