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Johnston County, North Carolina
Johnston County sits southeast of Raleigh in the eastern Piedmont, anchored by county seat Smithfield and the fast-growing town of Clayton along US-70 and I-40, amid a mostly rural, farmland landscape. Novo Nordisk and Grifols biopharma plants near Clayton anchor the job base, and Raleigh-driven growth has made platted-lot inventory and unincorporated-versus-municipal zoning jurisdiction key questions for brokers and developers.
Open the live Johnston County map →
Johnston County at a glance
- 256,000Population (2025)
- SmithfieldCounty seat
- 792 sq miLand area
- 323 / sq miDensity
- $83,000Median household income
- $305,000Median home value
What the live Johnston County map shows
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- City Boundaries: 11
- School Boundaries - Elementary: 24
- School Boundaries - Middle: 13
- School Boundaries - High: 8
- Residential: 3,111
- Commercial: 49
- Zoning: 126
- Traffic Counts: 113
- Congressional Districts: 1
- Emergency Services: 1
- Flood Zones: 1
- HUD: 349
- Opportunity Zones: 1
- Parks & Golf: 9
- Schools: 45
- Soils: 120
- State House Districts: 11
- State Senate Districts: 6
- Water Districts: 16
- Zip Codes: 25
- Development News: 5
Cities and towns in Johnston County
Archer Lodge, Benson, Clayton, Four Oaks, Kenly, Micro, Pine Level, Princeton, Selma, Smithfield, Wilson's Mills.
Neighboring counties
- Wayne County, NC · map
- Wake County, NC · map
- Wilson County, NC · map
- Harnett County, NC · map
- Franklin County, NC · map
- Nash County, NC · map
- Sampson County, NC · map