| Official Zip Code Name | Westfield |
| Zip Code State | Illinois |
| Primary County: | Clark |
| Area Code | 217 |
| Current Population: | 37081 |
| Racial Majority: | White 62.49% |
| Median Household Income | $55618 |
| Average Adjusted Gross Income | $89060 |
| Time Zone: | 6 |
| Elevation Range | 671 ft. |
| Area | 36.078 Sqm. |
| Coordinates(Y,X) | 39.436387, -87.994205 |