South Dakota area codes
South Dakota has one area code, 605, for all of South Dakota.
- Area codes
- 1
- Areas
- 1
- Overlay areas
- 0
- Time zone
- Central and Mountain
- ZIP codes
- 385 in South Dakota
Somewhere in South Dakota now? What area code am I in? answers from your location.
Every South Dakota area code
| Code | Where | Overlays | Since |
|---|---|---|---|
| 605 | Sioux Falls, Rapid City, Aberdeen | none | 1947 |
South Dakota area codes by area
Codes that overlay one another share one area. The places listed have a telephone rate centre of their own in NANPA's records, largest first; each links to its ZIP codes.
605 — Sioux Falls
229 places, the largest 36 here (all of them on 605):
- Sioux Falls
- Rapid City
- Aberdeen
- Brookings
- Watertown
- Mitchell
- Yankton
- Huron
- Pierre
- Spearfish
- Vermillion
- Brandon
- Sturgis
- Madison
- Belle Fourche
- Dell Rapids
- Hot Springs
- Milbank
- Hartford
- North Sioux City
- Canton
- Mobridge
- Winner
- Sisseton
- Chamberlain
- Elk Point
- Lennox
- Volga
- Flandreau
- Beresford
- Custer
- Pine Ridge
- Springfield
- Redfield
- Mc Laughlin
- Webster
8 counties:
Area codes of the largest cities in South Dakota
| City | Area codes | Population |
|---|---|---|
| Sioux Falls | 605 | 201,469 |
| Rapid City | 605 | 77,946 |
| Aberdeen | 605 | 28,189 |
| Brookings | 605 | 23,948 |
| Watertown | 605 | 23,044 |
| Mitchell | 605 | 15,649 |
| Yankton | 605 | 15,540 |
| Huron | 605 | 14,385 |
| Pierre | 605 | 13,948 |
| Spearfish | 605 | 12,930 |
| Box Elder † | 605 | 12,902 |
| Vermillion | 605 | 11,878 |
| Brandon | 605 | 10,996 |
| Harrisburg † | 605 | 8,519 |
| Black Hawk † | 605 | 7,937 |
| Sturgis | 605 | 7,086 |
| Rapid Valley † | 605 | 6,975 |
| Tea † | 605 | 6,786 |
| Madison | 605 | 6,094 |
| Belle Fourche | 605 | 5,804 |
| Dakota Dunes † | 605 | 3,936 |
| Dell Rapids | 605 | 3,905 |
| Hot Springs | 605 | 3,548 |
| Milbank | 605 | 3,525 |
| Hartford | 605 | 3,478 |
| North Sioux City | 605 | 3,045 |
| Canton | 605 | 3,033 |
| Summerset † | 605 | 3,022 |
| Lead † | 605 | 3,006 |
| Blackhawk † | 605 | 2,934 |
| Mobridge | 605 | 2,932 |
| Winner | 605 | 2,905 |
| Ellsworth Afb † | 605 | 2,787 |
| Sisseton | 605 | 2,670 |
| Colonial Pine Hills † | 605 | 2,609 |
| Chamberlain | 605 | 2,588 |
| Elk Point | 605 | 2,537 |
| Lennox | 605 | 2,468 |
| Fort Pierre † | 605 | 2,410 |
| Volga | 605 | 2,408 |
† NANPA lists no rate centre for the town itself; these are the codes of the nearest one. A town on an area-code boundary can differ from its neighbour.
Questions about South Dakota area codes
How many area codes does South Dakota have?
One: 605.
What are the area codes of the largest cities in South Dakota?
Sioux Falls: 605. Rapid City: 605. Aberdeen: 605. Brookings: 605. Watertown: 605.
What time zone are South Dakota area codes in?
Central and Mountain time.
Every US area code · South Dakota ZIP codes
Source: NANPA NPA database and central office code assignments, 2026-10-10. Places are matched to NANPA's rate centres by name; see sources.
Cite this page
zipcodes.pro. “South Dakota area codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/area-codes/sd
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