| Official Zip Code Name | Fairfield |
| Zip Code State | North Dakota |
| Primary County: | Billings |
| Area Code | 701 |
| Current Population: | 37081 |
| Racial Majority: | White 62.49% |
| Median Household Income | $55618 |
| Average Adjusted Gross Income | $89060 |
| Time Zone: | 7 |
| Elevation Range | 2654 ft. |
| Area | 285.858 Sqm. |
| Coordinates(Y,X) | 47.108543, -103.350191 |