Sioux City Iowa Area Code
One area code covers Sioux City: 712.
The code covering Sioux City
| Area code | Primarily serves | In service |
|---|---|---|
| 712 | Sioux City | 1947 |
Scope the codes matched to Sioux City. Source geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot) and LocalCallingGuide NPA list (2026-07 NPA list). Updated . Overlay relationships come from the numbering-plan authority; the place match is computed.
Which part of town has which code
Sioux City has a single code, so there is nothing to divide — every local line carries 712.
ZIP codes for the same city
Postal geography is organised separately from telephone geography, so Sioux City’s 9 ZIP codes do not map onto the codes above. They are listed in full, with the county each falls in, on the postal side of the site.
Nearby places with different codes
These are the closest places to Sioux City whose area codes are not the same set. If you are near one of them, a local number may carry a code that is not on the list above.
| City | Distance | Their area codes |
|---|---|---|
| Rockwell City Iowa area codes | 90 mi | 515, 712 |
| Rockwell Iowa area codes | 90 mi | 641 |
| Manson Iowa area codes | 94 mi | 515, 712 |
| Lohrville Iowa area codes | 95 mi | 515, 712 |
| Knierim Iowa area codes | 99 mi | 515 |
| Somers Iowa area codes | 100 mi | 515 |
| Churdan Iowa area codes | 101 mi | 515 |
| Gilmore City Iowa area codes | 101 mi | 515, 712 |
Straight-line distance between place reference points, not driving distance.