ZIP code 57646: Mound City, SD
57646 is a ZIP code in Mound City, South Dakota, mainly in Campbell County. About 272 people live here.
- Population
- 272
- Median household income
- $101,406
- Typical home value
- $113,300ACS median value
- Median rent
- —gross, per month
- Median age
- 37.5
- Homeowners
- 88.1%of occupied homes
Shaded: ZIP code 57646's area. Click anywhere on the map to see which ZIP code it's in.
ZIP codes within 10 milesWithin 25 miles
ZIP code 57646 details
| City | Mound City |
|---|---|
| State | South Dakota |
| County | Campbell County |
| Metro area | Not in a metro or micro area |
| Time zone | Central Time (UTC−6), observes daylight saving time |
| Type | Standard (delivery area) |
| Land area | 128.4 sq mi, plus 0.6 sq mi of water |
| Population density | 2 people per sq mi |
| Bachelor's degree or higher | 47% of adults 25+ |
| Average commute | 21 minutes |
| Center coordinates | 45.68048, -100.05824 |
ZIP codes near 57646
| ZIP code | City | Distance | Population |
|---|---|---|---|
| 57632 | Herreid, SD | 10.6 mi | 757 |
| 57631 | Glenham, SD | 13.1 mi | 364 |
| 57452 | Java, SD | 14.1 mi | 136 |
| 57472 | Selby, SD | 17.6 mi | 1,165 |
| 57648 | Pollock, SD | 21.3 mi | 465 |
| 57437 | Eureka, SD | 22.2 mi | 1,074 |
| 57428 | Bowdle, SD | 24.3 mi | 567 |
| 57658 | Wakpala, SD | 24.3 mi | 319 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Buying a home in 57646?
A typical home in ZIP code 57646 is worth about $113,300 (ACS median value). The median household here earns $101,406 a year. See what buying here would cost per month, with South Dakota average taxes and insurance filled in.
Monthly payment for a $113,300 homeWhat can a $101,406 income afford?Rental property numbers
About ZIP code 57646
What city is ZIP code 57646?
ZIP code 57646 is in Mound City, SD, in Campbell County.
What county is ZIP code 57646 in?
57646 is mainly in Campbell County, South Dakota.
What is the population of ZIP code 57646?
About 272 people live in ZIP code 57646, according to the American Community Survey 2020–2024 5-year estimates.
What time zone is ZIP code 57646 in?
57646 is in Central Time (UTC−6). It observes daylight saving time.