ZIP Code 57646

Zip Code: 57646
Type: Standard
Official USPS city name: Mound City
Official USPS State Code: SD
Official State Name: South Dakota
ZCTA: TRUE
Population: 252.0
Density: 0.7
Primary Official County Code: 46021
Primary Official County Name: Campbell
Official County Name: Campbell
Official County Code: 46021
Imprecise: FALSE
Military: FALSE
Timezone: America/Chicago (08:09 AM Friday, September 25 2026-09-25 (GMT -0500))
Geo Point: 45.69014, -100.08379

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