| Official Zip Code Name | Smithfield |
| Zip Code State | North Carolina |
| Primary County: | Johnston |
| Area Code | 919/984 |
| Current Population: | 37081 |
| Racial Majority: | White 62.49% |
| Median Household Income | $55618 |
| Average Adjusted Gross Income | $89060 |
| Time Zone: | 5 |
| Elevation Range | 130 ft. |
| Area | 103.716 Sqm. |
| Coordinates(Y,X) | 35.480752, -78.349111 |