| Official Zip Code Name | Middlefield |
| Zip Code State | Connecticut |
| Primary County: | Middlesex |
| Area Code | 860 |
| Current Population: | 37081 |
| Racial Majority: | White 62.49% |
| Median Household Income | $55618 |
| Average Adjusted Gross Income | $89060 |
| Time Zone: | 5 |
| Elevation Range | 191 ft. |
| Area | 10.738 Sqm. |
| Coordinates(Y,X) | 41.515715, -72.713110 |