Area Code 605 at a Glance
| Area code | 605 |
| Region | South Dakota |
| Country | United States |
| Primary timezone | America/Denver |
| Dialing format | +1 (605) NXX-XXXX |
Cities and Places Using Area Code 605
Based on prefix-level carrier data, area code 605 covers places including:
- Rapid City, SD
- Sioux Falls, SD
- Aberdeen, SD
- Watertown, SD
- Spearfish, SD
- Brookings, SD
- Yankton, SD
- Pierre, SD
- Mitchell, SD
- Huron, SD
- North Sioux City, SD
- Tea, SD
Frequently Asked Questions
Where is area code 605?
Area code 605 serves South Dakota, United States.
Who is calling me from area code 605?
A call from area code 605 most likely originates from South Dakota, but caller ID can be spoofed. If an unknown caller asks for personal or payment information, hang up and call the organization back on its official number.
How do I dial a 605 number?
Within North America: dial 1-605 followed by the 7-digit number. From abroad: your international prefix (like 00 or +), then 1 605 and the number.