ZIP code 57646
Where is ZIP code 57646?
Mound City, South Dakota
Campbell County · Standard ZIP code
ZIP code 57646 belongs to Mound City, South Dakota in Campbell County. 57646 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Central Time zone and uses area code 605. About 272 people live in the 57646 area, where the median household income is $101,406. The closest ZIP codes are 57632 (Herreid, 11.5 mi north), 57472 (Selby, 13.8 mi south) and 57631 (Glenham, 14.7 mi southwest).
| ZIP code | 57646 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Mound City |
| State | South Dakota (SD) |
| County | Campbell County |
| Time zone | Central Time · now |
| Area code | 605 |
| Coordinates | 45.6786, -100.0479 map |
| 3-digit prefix | 576 |
Population and income in 57646
| Population | 272 · lower than 73% of South Dakota ZIP codes |
|---|---|
| People per square mile | 2 · lower than 76% of South Dakota ZIP codes |
| Median age | 37.5 years · lower than 69% of South Dakota ZIP codes |
| Men / women | 53% / 47% |
| Median household income | $101,406 · higher than 89% of South Dakota ZIP codes |
| Income per person | $38,411 |
| Below the poverty line | 13% |
| Bachelor’s degree or higher | 47% of adults 25+ |
| Median home value | $113,300 · lower than 78% of South Dakota ZIP codes |
| Housing units | 143 |
| Households | 109 (2.5 people on average) |
| Owners / renters | 88% / 12% |
| Land area | 128.41 sq mi (plus 0.59 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 57646. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 57646
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 57632 | Herreid, SD | 11.5 mi N | Standard |
| 57472 | Selby, SD | 13.8 mi S | Standard |
| 57631 | Glenham, SD | 14.7 mi SW | Standard |
| 57648 | Pollock, SD | 18.6 mi NW | Standard |
| 57452 | Java, SD | 19.3 mi SE | Standard |
| 57601 | Mobridge, SD | 20.8 mi SW | Standard |
| 57658 | Wakpala, SD | 23.5 mi W | Standard |
| 57420 | Akaska, SD | 24.2 mi S | PO Box only |
| 57428 | Bowdle, SD | 24.6 mi SE | Standard |
| 58581 | Zeeland, ND | 26.2 mi NE | Standard |
| 58542 | Hague, ND | 26.5 mi N | Standard |
| 57448 | Hosmer, SD | 28.2 mi E | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 57646 or measure the distance to another ZIP code.
How to address mail to 57646
123 MAIN ST
MOUND CITY SD 57646
Put the city, the two-letter state code and the ZIP code on the last line. Avoid Campbell: USPS doesn’t recognize it as the city for this ZIP code. Adding the 4-digit ZIP+4 code (57646-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 57646?
- 57646 is a Mound City, South Dakota ZIP code.
- What county is 57646 in?
- ZIP code 57646 is in Campbell County, South Dakota.
- What time zone is ZIP code 57646 in?
- 57646 is in the Central Time zone (America/Chicago).
- What area code is 57646?
- Phone numbers in ZIP code 57646 use area code 605.
- What is the population of ZIP code 57646?
- About 272 people live in ZIP code 57646, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 57646?
- The median household income in 57646 is $101,406 a year, higher than 89% of South Dakota ZIP codes.
- What ZIP codes are near 57646?
- The nearest ZIP codes to 57646 are 57632 (Herreid, 11.5 miles), 57472 (Selby, 13.8 miles), 57631 (Glenham, 14.7 miles) and 57648 (Pollock, 18.6 miles).