What city is ZIP code 57571?

ZIP code 57571 is in St. Charles, SD (Gregory County).

What county is ZIP code 57571 in?

ZIP code 57571 is mostly in Gregory County, South Dakota.

How many people live in ZIP code 57571?

About 22 people live in the 57571 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.

Checked Oct 26, 2026

ZIP Code 57571

St. Charles, SD, Gregory County

Population

Land area

10.7sq mi

People per sq mi

City

St. Charles

ZIP 57571 and nearby ZIP codes

Full map

ZIP 57571 at a glance

ZIP 57571 (St. Charles) is 83% less dense than South Dakota as a whole.

Economy and federal money

Businesses, pandemic loans and political donations

Details

PPP loans

$78.4K

5 loans

PPP loans in this ZIP

Environment and hazard risk

ZIP 57571, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Very Low

Top: cold wave

Storm events since 1996

706

Countywide, mostly hail

Flood insurance policies

0.0% of homes, county

July high / Jan low

87° / 11°F

25.9 inches of rain a year

Hazards, floods and storm history Check a flood zone

Frequently asked questions

What city is ZIP code 57571?: ZIP code 57571 is in St. Charles, SD (Gregory County).
What county is ZIP code 57571 in?: ZIP code 57571 is mostly in Gregory County, South Dakota.
How many people live in ZIP code 57571?: About 22 people live in the 57571 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.

Source: U.S. Census Bureau (ZIP Code Tabulation Areas, American Community Survey) · Data as of 12/31/2023. ZIP Code Tabulation Areas closely match, but are not identical to, USPS ZIP code delivery areas.