| | | Chatham County | NC | 37037 | | Durham-Chapel Hill, NC 20500 | Raleigh-Durham-Cary, NC 450 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=ChathamCounty+NC |
| | | Durham County | NC | 37063 | | Durham-Chapel Hill, NC 20500 | Raleigh-Durham-Cary, NC 450 | Central | metro county (urban) | manufacturing-dependent | https://maps.google.com/?q=DurhamCounty+NC |
| | | Franklin County | NC | 37069 | | Raleigh-Cary, NC 39580 | Raleigh-Durham-Cary, NC 450 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=FranklinCounty+NC |
| | | Harnett County | NC | 37085 | | Anderson Creek, NC 11360 | Raleigh-Durham-Cary, NC 450 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=HarnettCounty+NorthCarolina |
| | | Johnston County | NC | 37101 | | Raleigh-Cary, NC 39580 | Raleigh-Durham-Cary, NC 450 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=JohnstonCounty+NC |
| | | Lee County | NC | 37105 | | Sanford, NC 41820 | Raleigh-Durham-Cary, NC 450 | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=LeeCounty+NC |
| | | Orange County | NC | 37135 | | Durham-Chapel Hill, NC 20500 | Raleigh-Durham-Cary, NC 450 | Central | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=OrangeCounty+NC |
| | | Person County | NC | 37145 | | Durham-Chapel Hill, NC 20500 | Raleigh-Durham-Cary, NC 450 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=PersonCounty+NC |
| | | Vance County | NC | 37181 | | Henderson, NC 25780 | Raleigh-Durham-Cary, NC 450 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=VanceCounty+NC |
| | | Wake County | NC | 37183 | | Raleigh-Cary, NC 39580 | Raleigh-Durham-Cary, NC 450 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=WakeCounty+NC |
