| Official Zip Code Name | Water Mill |
| Zip Code State | New York |
| Primary County: | Suffolk |
| Area Code | 631/934 |
| Current Population: | 37081 |
| Racial Majority: | White 62.49% |
| Median Household Income | $55618 |
| Average Adjusted Gross Income | $89060 |
| Time Zone: | 5 |
| Elevation Range | 32 ft. |
| Area | 12.97 Sqm. |
| Coordinates(Y,X) | 40.931359, -72.340775 |