| Official Zip Code Name | Duncan |
| Zip Code State | Oklahoma |
| Primary County: | Stephens |
| Area Code | 580 |
| Current Population: | 37081 |
| Racial Majority: | White 62.49% |
| Median Household Income | $55618 |
| Average Adjusted Gross Income | $89060 |
| Time Zone: | 6 |
| Elevation Range | 1073 ft. |
| Area | 329.541 Sqm. |
| Coordinates(Y,X) | 34.452727, -97.852217 |