Where Is Area Code 605?
Area code 605 is found in the US state of South Dakota. Servicing the entire state, area code 605 includes the city of Sioux Falls (population: 148855), and all 66 counties of South Dakota.
Parts of this area code are located in the Central time zone, while others are in the Mountain time zone. This means that some cities in area code 605 are on the same time as Chicago, IL, while others are on the same time as Phoenix, AZ.
Area code 605 was brought into effect on January 1, 1947.
Counties in Area Code 605
- Aurora,
- Beadle,
- Bennett,
- Bon Homme,
- Brookings,
- Brown,
- Brule,
- Buffalo,
- Butte,
- Charles Mix,
- Clark,
- Clay,
- Codington,
- Corson,
- Custer,
- Davison,
- Day,
- Deuel,
- Dewey,
- Douglas,
- Edmunds,
- Fall River,
- Faulk,
- Grant,
- Gregory,
- Haakon,
- Hamlin,
- Hand,
- Hanson,
- Hughes,
- Hutchinson,
- Hyde,
- Jackson,
- Jerauld,
- Kingsbury,
- Lake,
- Lawrence,
- Lincoln,
- Lyman,
- Marshall,
- McCook,
- McPherson,
- Meade,
- Mellette,
- Miner,
- Minnehaha,
- Moody,
- Pennington,
- Perkins,
- Potter,
- Roberts,
- Sanborn,
- Shannon,
- Spink,
- Stanley,
- Sully,
- Todd,
- Tripp,
- Turner,
- Union,
- Walworth,
- Yankton,
- Ziebach.
Most Populous Cities in Area Code 605
| City | County | City Population | Time Zone |
|---|---|---|---|
| Sioux Falls | Minnehaha | 148,855 | CST |
| Rapid City | Pennington | 93,684 | MST |
| Aberdeen | Brown | 30,719 | CST |
| Watertown | Codington | 25,330 | CST |
| Brookings | Brookings | 25,035 | CST |
| Yankton | Yankton | 19,260 | CST |
| Mitchell | Davison | 18,624 | CST |
| Sioux Falls | Lincoln | 18,597 | CST |
| Pierre | Hughes | 16,721 | CST |
| Spearfish | Lawrence | 15,135 | MST |
| Huron | Beadle | 14,830 | CST |
| Vermillion | Clay | 12,218 | CST |
| Brandon | Minnehaha | 10,817 | CST |
| Sturgis | Meade | 9,594 | MST |
| Madison | Lake | 8,844 | CST |
| Belle Fourche | Butte | 8,101 | MST |
| Black Hawk | Meade | 6,460 | MST |
| Box Elder | Pennington | 6,418 | MST |
| Harrisburg | Lincoln | 6,362 | CST |
| North Sioux City | Union | 5,972 | CST |
| Hot Springs | Fall River | 5,783 | MST |
| Tea | Lincoln | 5,461 | CST |
| Pine Ridge | Shannon | 5,454 | MST |
| Custer | Custer | 5,397 | MST |
| Dell Rapids | Minnehaha | 5,143 | CST |
Note: The above list is based off of the top 25 most populous cities in the area code as per 2012 United States Census Bureau estimates.
View all United States Area Codes.
This page was last updated on July 3, 2015.