Founded in 1855, Harnett County is one of 100 counties in the state of North Carolina. Historically, Harnett County was formed from Cumberland County. The city of Lillington is the county seat. With FIPS code of 85, Harnett County has a population of 135,966 and area of 601 square miles (1,557 km2).
List of all cities in Harnett County, NC alphabetically
| City/Town | Postal Code | Area Code |
| Angier, NC | 27501 | 919/984 |
| Buies Creek, NC | 27506 | 910 |
| Bunnlevel, NC | 28323 | 910 |
| Cameron, NC | 28326 | 919/984 |
| Coats, NC | 27521 | 910 |
| Dunn, NC | 28334 | 910 |
| Dunn, NC | 28335 | 910 |
| Erwin, NC | 28339 | 910 |
| Kipling, NC | 27543 | 919/984 |
| Lillington, NC | 27546 | 910 |
| Mamers, NC | 27552 | 910 |
| Olivia, NC | 28368 | 919/984 |