57571 ZIP Code — Saint Charles, SD

Gregory County, South Dakota

ZIP code 57571 is located in Saint Charles, South Dakota, within Gregory County. It covers approximately 10.66 square miles and serves a population of 31 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 605.

population

10.66

sq mi land

Standard

ZIP type

Central (CT)

timezone

57571 ZIP code map

Cities in ZIP code 57571

Below are the cities the US Postal Service accepts for ZIP code 57571. Using any city not on this list may result in mail delivery delays.

City	Status
Saint Charles	Acceptable

Demographics updated 05/2026

Population
Total population	31
Population density	3 / sq mi
State FIPS	46
County FIPS	053

Geography
Land area	10.66 sq mi
Water area	0.00 sq mi
Latitude	43.1257
Longitude	-99.0896
Timezone	Central (CT)
Area code	605

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	100.0%	53.1%	41.7%
$50k – $100k	0.0%	30.6%	33.8%
$100k – $200k	0.0%	13.7%	20.1%
Over $200k	0.0%	2.6%	4.4%

Demographics & statistics

Population

People per sq mi

58.5

Median age

$23,333

Median household income

$12,971

Per capita income

$56,700

Median home value

Median monthly rent

100.0%

Home ownership

22.6%

Poverty rate

0.0%

Unemployment

Housing units

15.0%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

20–24

25–34

55–59

65–74

75–84

← Male

Female →

Age summary

Group	Count	%
Under 18	8	25.8%
18 and over	23	74.2%
65 and over	12	38.7%
Median age	58.5 years

Race & ethnicity

White 51.6%

Two or more races 35.5%

American Indian / Alaska Native 12.9%

Group	Count	%
White	16	51.6%
Two or more races	11	35.5%
American Indian / Alaska Native	4	12.9%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	100.0%	53.1%	41.7%
$50k – $100k	0.0%	30.6%	33.8%
$100k – $200k	0.0%	13.7%	20.1%
Over $200k	0.0%	2.6%	4.4%

Under $10k 6.3%

$15k–$25k 56.3%

$35k–$50k 37.5%

Range	% of households
Under $10k	6.3%
$15k–$25k	56.3%
$35k–$50k	37.5%
Median income	$23,333

Housing

Home values

Under $50k 37.5%

$50k–$100k 43.8%

$200k–$300k 18.8%

Housing overview

Metric	Value
Median home value	$56,700
Median rent / month	$0
Owner occupied	100.0%
Renter occupied	0.0%
Vacant	27.3%
Single-family detached	100.0%
Large apartment buildings	0.0%
Mobile homes	0.0%
Median rooms	5.8
Avg household size (owned)	1.94

Year built

Era	%
2020 or later	0.0%
2010–2019	0.0%
2000–2009	0.0%
1990–1999	13.6%
1980–1989	0.0%
1970–1979	13.6%
1960–1969	27.3%
1950–1959	4.5%
1940–1949	0.0%
1939 or earlier	40.9%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	0.0%
2 bedrooms	40.9%
3 bedrooms	13.6%
4 bedrooms	45.5%
5+ bedrooms	0.0%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	37.5%
2 vehicles	0.0%
3 or more	62.5%

Heating fuel

Fuel type	%
Electricity	62.5%
Propane / LP gas	37.5%

Households & families

Household type	Count	%
Married-couple family	9	56.3%
Cohabiting couple	0	0.0%
Male householder, no spouse	3	18.8%
Female householder, no spouse	4	25.0%
Households with children under 18	3	18.8%
Households with seniors (65+)	6	37.5%
Average household size	1.94

Marital status

Status	Male	Female
Never married	30.0%	23.1%
Married	70.0%	76.9%
Separated	0.0%	0.0%
Widowed	0.0%	0.0%
Divorced	0.0%	0.0%

Education

Less than 9th grade 0.0%

Some HS, no diploma 20.0%

HS graduate 30.0%

Some college, no degree 35.0%

Associate's degree 0.0%

Bachelor's degree 15.0%

Graduate / professional 0.0%

Metric	%
HS diploma or higher	80.0%
Bachelor's or higher	15.0%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	0	0.0%
Elementary school	0	0.0%
High school	0	0.0%
College / grad school	0	0.0%

Employment

Industry of employment

Construction 57.1%

Education & healthcare 42.9%

Occupation

Category	%
Management, business & arts	42.9%
Service	0.0%
Sales & office	0.0%
Natural resources & construction	57.1%
Production & transportation	0.0%

Employment type

Type	%
Private sector	57.1%
Government	42.9%
Self-employed	0.0%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	0.0%
Carpool	100.0%
Public transit	0.0%
Walk	0.0%
Work from home	0.0%
Other means	0.0%
Avg commute (minutes)	0.0

Poverty

All people 22.6%

Under 18 years 0.0%

18 and over 30.4%

Married-couple families 33.3%

Female-led households 0.0%

Income support

Source	% of households
Social Security	56.3%
Retirement income	0.0%
Supplemental Security	18.8%
Cash public assistance	0.0%
Food stamps / SNAP	0.0%

Health indicators

Condition	%
Obesity	0.0%
High blood pressure	0.0%
High cholesterol	0.0%
Diabetes	0.0%
Heart disease	0.0%
Stroke	0.0%
Asthma	0.0%
Arthritis	0.0%
Kidney disease	0.0%
Pulmonary disease	0.0%
Cancer	0.0%

Behavior / access	%
Smoking	0.0%
Binge drinking	0.0%
No physical activity	0.0%
Less than 7 hrs sleep	0.0%
Depression	0.0%
Fair or poor health	0.0%
Poor mental health	0.0%
Poor physical health	0.0%
No health insurance	0.0%
Visited doctor (checkup)	0.0%
Visited dentist	0.0%
Cholesterol screening	0.0%
Teeth loss	0.0%

Veterans & disability

Veterans	Count	%
Civilian veterans	0	0.0%

Disability	%
Any disability	9.7%
Under 18	0.0%
18–64 years	27.3%
65 and over	0.0%

Health insurance coverage

Type	%
Private insurance	51.6%
Public insurance	83.9%
No insurance	3.2%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	26	83.9%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	31	100.0%
Born in same state	31	100.0%
Born in different state	25	80.6%
Foreign born	0	0.0%
Naturalized citizen	0	0.0%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
Italian	11	35.5%

Technology access

Metric	% of households
Computer access	51.6%
Internet access	81.3%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 57571

What city is ZIP code 57571 in?

ZIP code 57571 is primarily assigned to Saint Charles, South Dakota.

What county is ZIP code 57571 in?

ZIP code 57571 falls within Gregory County, South Dakota.

Does ZIP code 57571 have an older population?

39% of residents in ZIP code 57571 are 65 or older, above the national average of ~17%.

Does ZIP code 57571 have a large retiree population?

56% of households in ZIP code 57571 receive Social Security income, suggesting a significant retiree or disability population.

What is the poverty rate in ZIP code 57571?

23% of residents in ZIP code 57571 live below the poverty line, above the national average.

What is the median household income in ZIP code 57571?

The median household income in ZIP code 57571 is $23,333, below the national median of ~$75,000.

What timezone is ZIP code 57571 in?

ZIP code 57571 observes the CST timezone.