| Official Zip Code Name | Mount Calm |
| Zip Code State | Texas |
| Primary County: | Hill |
| Area Code | 254 |
| Current Population: | 37081 |
| Racial Majority: | White 62.49% |
| Median Household Income | $55618 |
| Average Adjusted Gross Income | $89060 |
| Time Zone: | 6 |
| Elevation Range | 626 ft. |
| Area | 89.432 Sqm. |
| Coordinates(Y,X) | 31.762080, -96.905168 |