South Dakota Area Codes — 1 Codes
South Dakota has 1 North American Numbering Plan area code, covering about 905,421 people. The table lists each code with its largest towns, population and overlaps.
All area codes in South Dakota
| Area code | Largest towns | Population | ZIP codes | Overlaps |
|---|---|---|---|---|
| 605 | Sioux Falls, Rapid City, Aberdeen | 905,421 | 376 | — |
Largest cities in South Dakota
Sioux Falls 605Rapid City 605Aberdeen 605Watertown 605Brookings 605Yankton 605Mitchell 605Spearfish 605Pierre 605Huron 605Vermillion 605Brandon 605Box Elder 605Sturgis 605Harrisburg 605Belle Fourche 605
Frequently asked questions
How many area codes does South Dakota have?
South Dakota uses 1 area codes.
What is the main area code in South Dakota?
605 covers the largest population in South Dakota.
How do I find the area code for a town?
Open the town in the city list above; each town page lists every area code assigned to it.