57657 ZIP Code — Trail City, SD

Corson County, South Dakota

ZIP code 57657 is located in Trail City, South Dakota, within Corson County. It covers approximately 191.21 square miles and serves a population of 218 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 605.

About ZIP code 57657

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $68,600. Owner-occupancy is high at 93%, well above the national average.

Median household income is $132,500. 41% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with agriculture and mining as the leading industry. The average commute of 20 minutes is near the national average. Remote work is prevalent — 30% of workers work from home.

College attainment at 18% is below the national average, consistent with a trades and production-oriented local economy.

Health indicators show elevated rates of smoking (27%) compared to national benchmarks.

Overall, ZIP code 57657 reflects a community defined by a trades-oriented workforce, high homeownership, a high rate of remote workers, and a significant Social Security-dependent population.

218

population

191.21

sq mi land

Standard

ZIP type

Mountain (MT)

timezone

57657 ZIP code map

Cities in ZIP code 57657

Below are the cities the US Postal Service accepts for ZIP code 57657. Using any city not on this list may result in mail delivery delays.

City	Status
Trail City	Preferred

Nearby ZIP codes

57601 Mobridge (8.5 mi) 57656 Timber Lake (13.8 mi)

Demographics updated 05/2026

Population
Total population	218
Population density	1 / sq mi
State FIPS	46
County FIPS	031

Geography
Land area	191.21 sq mi
Water area	2.40 sq mi
Latitude	45.4114
Longitude	-100.7093
Timezone	Mountain (MT)
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	33.8%	61.0%	41.7%
$50k – $100k	24.6%	23.8%	33.8%
$100k – $200k	35.4%	12.9%	20.1%
Over $200k	6.2%	2.3%	4.4%

Demographics & statistics

218

Population

People per sq mi

31.3

Median age

$132,500

Median household income

$30,075

Per capita income

$68,600

Median home value

Median monthly rent

92.9%

Home ownership

13.1%

Poverty rate

17.6%

Unemployment

Housing units

18.1%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

25–34

35–44

45–54

55–59

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	69	31.7%
18 and over	149	68.3%
65 and over	37	17.0%
Median age	31.3 years

Race & ethnicity

American Indian / Alaska Native 54.5%

White 41.8%

Two or more races 1.8%

Hispanic or Latino 0.9%

Other race 0.9%

Group	Count	%
American Indian / Alaska Native	120	54.5%
White	92	41.8%
Two or more races	4	1.8%
Hispanic or Latino	2	0.9%
Other race	2	0.9%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	33.8%	61.0%	41.7%
$50k – $100k	24.6%	23.8%	33.8%
$100k – $200k	35.4%	12.9%	20.1%
Over $200k	6.2%	2.3%	4.4%

$10k–$15k 8.9%

$35k–$50k 7.1%

$75k–$100k 28.6%

$100k–$150k 30.4%

$150k–$200k 25.0%

Range	% of households
$10k–$15k	8.9%
$35k–$50k	7.1%
$75k–$100k	28.6%
$100k–$150k	30.4%
$150k–$200k	25.0%
Median income	$132,500

Housing

Home values

Under $50k 17.3%

$50k–$100k 42.3%

$100k–$150k 9.6%

$200k–$300k 13.5%

$300k–$500k 17.3%

Housing overview

Metric	Value
Median home value	$68,600
Median rent / month	$0
Owner occupied	92.9%
Renter occupied	7.1%
Vacant	20.0%
Single-family detached	85.7%
Large apartment buildings	0.0%
Mobile homes	14.3%
Median rooms	6.0
Avg household size (owned)	4.08

Year built

Era	%
2020 or later	0.0%
2010–2019	15.7%
2000–2009	4.3%
1990–1999	4.3%
1980–1989	10.0%
1970–1979	27.1%
1960–1969	0.0%
1950–1959	2.9%
1940–1949	0.0%
1939 or earlier	35.7%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	2.9%
2 bedrooms	30.0%
3 bedrooms	32.9%
4 bedrooms	18.6%
5+ bedrooms	15.7%

Vehicles per household

Vehicles	% of households
No vehicle	5.4%
1 vehicle	14.3%
2 vehicles	28.6%
3 or more	51.8%

Heating fuel

Fuel type	%
Electricity	7.1%
Propane / LP gas	92.9%

Households & families

Household type	Count	%
Married-couple family	37	66.1%
Cohabiting couple	7	12.5%
Male householder, no spouse	6	10.7%
Female householder, no spouse	6	10.7%
Households with children under 18	28	50.0%
Households with seniors (65+)	20	35.7%
Average household size	3.89

Marital status

Status	Male	Female
Never married	34.9%	37.8%
Married	60.5%	48.6%
Separated	0.0%	0.0%
Widowed	0.0%	13.5%
Divorced	4.7%	0.0%

Education

Less than 9th grade 0.0%

Some HS, no diploma 4.3%

HS graduate 35.5%

Some college, no degree 12.3%

Associate's degree 29.7%

Bachelor's degree 14.5%

Graduate / professional 3.6%

Metric	%
HS diploma or higher	95.7%
Bachelor's or higher	18.1%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	6	8.7%
Elementary school	41	59.4%
High school	14	20.3%
College / grad school	8	11.6%

Employment

Industry of employment

Agriculture & mining 31.0%

Education & healthcare 29.8%

Retail trade 13.1%

Construction 11.9%

Public administration 6.0%

Manufacturing 4.8%

Finance & real estate 2.4%

Transportation & utilities 1.2%

Occupation

Category	%
Management, business & arts	54.8%
Service	8.3%
Sales & office	11.9%
Natural resources & construction	11.9%
Production & transportation	13.1%

Employment type

Type	%
Private sector	33.3%
Government	48.8%
Self-employed	17.9%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	48.8%
Carpool	21.4%
Public transit	0.0%
Walk	0.0%
Work from home	29.8%
Other means	0.0%
Avg commute (minutes)	19.6

Poverty

All people 13.1%

Under 18 years 14.1%

18 and over 12.8%

Married-couple families 8.1%

Female-led households 0.0%

Income support

Source	% of households
Social Security	41.1%
Retirement income	19.6%
Supplemental Security	5.4%
Cash public assistance	5.4%
Food stamps / SNAP	10.7%

Health indicators

Condition	%
Obesity	41.2%
High blood pressure	39.7%
High cholesterol	37.0%
Diabetes	15.0%
Heart disease	10.4%
Stroke	5.4%
Asthma	10.9%
Arthritis	31.0%
Kidney disease	4.5%
Pulmonary disease	11.1%
Cancer	7.5%

Behavior / access	%
Smoking	26.8%
Binge drinking	17.3%
No physical activity	32.1%
Less than 7 hrs sleep	30.1%
Depression	16.8%
Fair or poor health	21.1%
Poor mental health	12.5%
Poor physical health	14.7%
No health insurance	14.5%
Visited doctor (checkup)	76.8%
Visited dentist	56.3%
Cholesterol screening	87.8%
Teeth loss	23.5%

Veterans & disability

Veterans	Count	%
Civilian veterans	2	1.3%

Disability	%
Any disability	9.6%
Under 18	0.0%
18–64 years	9.8%
65 and over	27.0%

Health insurance coverage

Type	%
Private insurance	53.2%
Public insurance	45.0%
No insurance	9.2%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	207	95.0%
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)	218	100.0%
Born in same state	216	99.1%
Born in different state	87	39.9%
Foreign born	2	0.9%
Naturalized citizen	0	0.0%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
Arab	4	1.8%

Technology access

Metric	% of households
Computer access	25.7%
Internet access	96.4%

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

Frequently asked questions about ZIP code 57657

What city is ZIP code 57657 in?

ZIP code 57657 is primarily assigned to Trail City, South Dakota.

What county is ZIP code 57657 in?

ZIP code 57657 falls within Corson County, South Dakota.

Is ZIP code 57657 family-oriented?

32% of residents in ZIP code 57657 are under 18, reflecting a younger, family-oriented community.

Is ZIP code 57657 mostly owner-occupied?

93% of occupied units in ZIP code 57657 are owner-occupied, well above the national average.

Does ZIP code 57657 have a large retiree population?

41% of households in ZIP code 57657 receive Social Security income, suggesting a significant retiree or disability population.

What is the median household income in ZIP code 57657?

The median household income in ZIP code 57657 is $132,500, above the national median of ~$75,000.

What timezone is ZIP code 57657 in?

ZIP code 57657 observes the MST timezone.