Minnehaha County · South Dakota
Sioux Falls, SD area codes and time zone
Quick answer
Sioux Falls is served by area code 605, keeps CST time (GMT-6), and sits in county FIPS 46099.
- Area code
- 605Within 25 miles of the city centre
- Time zone
- CSTAmerica/Chicago
- UTC offset
- GMT-6CDT in summer (UTCGMT-5)
- County FIPS
- 46099Minnehaha County
Dialling from and to Sioux Falls
What this means when you pick up the phone.
Local calls inside 605 may still work on seven digits, but ten-digit dialling is the safe default everywhere in the country now. From abroad, dial +1 then the ten digits.
How Sioux Falls came to have one area code
Why one city can carry several codes.
Area codes are assigned to geography, then exhausted as demand grows. Sioux Falls — population about 202k — is covered by code 605, drawn from within 25 miles of the city centre. A single code still has enough numbers for the area, so no overlay has been needed yet. When growth exhausts it, regulators will layer on a new code and local calls will move to ten digits.
More Sioux Falls data
Other Sioux Falls datasets on this site.
- Sioux Falls population and income
- Sioux Falls sales tax rate
- Sioux Falls property tax
- Sioux Falls cost of living
- Sioux Falls home values and rent
- Sioux Falls crime rates
- Sioux Falls public schools
- Sioux Falls weather normals
- Sioux Falls commute times
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