THE JOHNSTON COUNTY LAND BRIEF
Land in the
Rolling Coastal Plain setting.
Johnston County has 792 square miles of land in North Carolina. 3 mapped landscape regions meet across Johnston County: Rolling Coastal Plain, Northern Outer Piedmont, Southeastern Floodplains and Low Terraces.
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.
Regional context: Southeastern Plains ↗ · Regional mapping across the county footprint
Where the landscape changes
Johnston County intersects 3 mapped regional units. The largest mapped shares are:
- Rolling Coastal Plain70.5%
- Northern Outer Piedmont20.2%
- Southeastern Floodplains and Low Terraces9.3%
Piedmont in Johnston County
The Piedmont is a belt of irregular plains and hills between the Appalachians and the coastal plain. A complex mixture of older rocks underlies its pine and hardwood woodland landscapes.
Read the regional source ↗Finding your parcel within Johnston County
The atlas lists 12 cities, towns, townships, and Census communities associated with Johnston County, including Clayton, Smithfield, Archer Lodge. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Johnston County by land and water
The Census records 3.63 square miles of water within Johnston County, or 0.5% of its total area. That share is close to Johnston County’s 0.5%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Johnston County has 62.2 times the land area of nearby Smithfield town (12.7 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Franklin County, Harnett County, Nash County, Sampson County, Wake County, Wayne County, Wilson County within North Carolina. A tract near one of these lines should be matched to the county identifier on its own records.

