57738 ZIP Code — Fairburn, SD

Custer County, South Dakota

ZIP code 57738 is located in Fairburn, South Dakota, within Custer County. It covers approximately 185.11 square miles and serves a population of 364 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 605.

About ZIP code 57738

The housing stock consists of a higher-than-average concentration of mobile homes. Most homes were built in the 2000s, giving the area an established character.

Median household income is $46,023. 89% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 32 minutes is near the national average.

College attainment at 5% is below the national average, consistent with a trades and production-oriented local economy.

Notable community characteristics include a notable veteran presence at 25% of civilians, above the national average of 7%; and disability rates above the national average at 23%.

Overall, ZIP code 57738 reflects a community defined by a trades-oriented workforce, a strong veteran community, high homeownership, and a significant Social Security-dependent population.

364

population

185.11

sq mi land

Standard

ZIP type

Mountain (MT)

timezone

57738 ZIP code map

Cities in ZIP code 57738

Below are the cities the US Postal Service accepts for ZIP code 57738. Using any city not on this list may result in mail delivery delays.

City	Status
Fairburn	Acceptable
Fairburn	Preferred

Nearby ZIP codes

57722 Buffalo Gap (9.9 mi) 57744 Hermosa (11.1 mi) 57751 Keystone (19.6 mi)

Demographics updated 05/2026

Population
Total population	364
Population density	2 / sq mi
State FIPS	46
County FIPS	033

Geography
Land area	185.11 sq mi
Water area	0.61 sq mi
Latitude	43.6537
Longitude	-103.2006
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	64.5%	37.6%	41.7%
$50k – $100k	28.9%	34.7%	33.8%
$100k – $200k	6.6%	25.3%	20.1%
Over $200k	0.0%	2.4%	4.4%

Demographics & statistics

364

Population

People per sq mi

60.9

Median age

$46,023

Median household income

$37,887

Per capita income

Median home value

Median monthly rent

99.1%

Home ownership

1.9%

Poverty rate

5.9%

Unemployment

250

Housing units

4.8%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

15–19

25–34

45–54

55–59

60–64

65–74

75–84

← Male

Female →

Age summary

Group	Count	%
Under 18	29	8.0%
18 and over	335	92.0%
65 and over	177	48.6%
Median age	60.9 years

Race & ethnicity

White 97.8%

Two or more races 2.2%

Group	Count	%
White	356	97.8%
Two or more races	8	2.2%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	64.5%	37.6%	41.7%
$50k – $100k	28.9%	34.7%	33.8%
$100k – $200k	6.6%	25.3%	20.1%
Over $200k	0.0%	2.4%	4.4%

$10k–$15k 1.4%

$15k–$25k 2.8%

$25k–$35k 2.4%

$35k–$50k 46.4%

$50k–$75k 26.1%

$100k–$150k 20.9%

Range	% of households
$10k–$15k	1.4%
$15k–$25k	2.8%
$25k–$35k	2.4%
$35k–$50k	46.4%
$50k–$75k	26.1%
$100k–$150k	20.9%
Median income	$46,023

Housing

Home values

Under $50k 4.3%

$50k–$100k 1.4%

$100k–$150k 1.4%

$150k–$200k 5.3%

$200k–$300k 1.0%

$300k–$500k 41.6%

$500k–$1M 26.8%

$1M+ 18.2%

Housing overview

Metric	Value
Median home value	$0
Median rent / month	$0
Owner occupied	99.1%
Renter occupied	0.9%
Vacant	16.3%
Single-family detached	61.1%
Large apartment buildings	0.0%
Mobile homes	38.9%
Median rooms	6.1
Avg household size (owned)	1.72

Year built

Era	%
2020 or later	0.0%
2010–2019	20.2%
2000–2009	71.0%
1990–1999	0.8%
1980–1989	2.4%
1970–1979	1.2%
1960–1969	0.0%
1950–1959	0.8%
1940–1949	0.0%
1939 or earlier	3.6%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	6.7%
2 bedrooms	8.3%
3 bedrooms	51.6%
4 bedrooms	18.3%
5+ bedrooms	15.1%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	4.3%
2 vehicles	73.9%
3 or more	21.8%

Heating fuel

Fuel type	%
Electricity	34.1%
Propane / LP gas	65.9%

Households & families

Household type	Count	%
Married-couple family	98	46.4%
Cohabiting couple	0	0.0%
Male householder, no spouse	103	48.8%
Female householder, no spouse	10	4.7%
Households with children under 18	44	20.9%
Households with seniors (65+)	143	67.8%
Average household size	1.73

Marital status

Status	Male	Female
Never married	2.4%	0.8%
Married	47.3%	91.6%
Separated	0.0%	0.0%
Widowed	0.0%	3.1%
Divorced	50.2%	4.6%

Education

Less than 9th grade 0.0%

Some HS, no diploma 3.6%

HS graduate 52.2%

Some college, no degree 23.6%

Associate's degree 15.8%

Bachelor's degree 4.2%

Graduate / professional 0.6%

Metric	%
HS diploma or higher	96.4%
Bachelor's or higher	4.8%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	0	0.0%
Elementary school	25	96.2%
High school	1	3.8%
College / grad school	0	0.0%

Employment

Industry of employment

Education & healthcare 73.7%

Other services 12.6%

Manufacturing 3.2%

Professional & management 3.2%

Construction 2.1%

Transportation & utilities 2.1%

Public administration 2.1%

Retail trade 1.1%

Occupation

Category	%
Management, business & arts	75.8%
Service	2.1%
Sales & office	1.1%
Natural resources & construction	3.2%
Production & transportation	17.9%

Employment type

Type	%
Private sector	24.2%
Government	73.7%
Self-employed	2.1%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	93.5%
Carpool	4.3%
Public transit	0.0%
Walk	2.2%
Work from home	0.0%
Other means	0.0%
Avg commute (minutes)	31.8

Poverty

All people 1.9%

Under 18 years 0.0%

18 and over 2.1%

Married-couple families 0.0%

Female-led households 66.7%

Income support

Source	% of households
Social Security	88.6%
Retirement income	11.8%
Supplemental Security	0.0%
Cash public assistance	0.0%
Food stamps / SNAP	2.8%

Health indicators

Condition	%
Obesity	34.9%
High blood pressure	35.6%
High cholesterol	32.5%
Diabetes	10.1%
Heart disease	7.9%
Stroke	3.6%
Asthma	8.8%
Arthritis	26.4%
Kidney disease	3.3%
Pulmonary disease	6.6%
Cancer	8.1%

Behavior / access	%
Smoking	18.4%
Binge drinking	18.7%
No physical activity	24.0%
Less than 7 hrs sleep	28.0%
Depression	15.3%
Fair or poor health	12.3%
Poor mental health	10.1%
Poor physical health	9.6%
No health insurance	11.6%
Visited doctor (checkup)	76.8%
Visited dentist	67.0%
Cholesterol screening	90.5%
Teeth loss	13.5%

Veterans & disability

Veterans	Count	%
Civilian veterans	83	24.8%

Disability	%
Any disability	23.1%
Under 18	0.0%
18–64 years	26.6%
65 and over	23.7%

Health insurance coverage

Type	%
Private insurance	64.6%
Public insurance	62.6%
No insurance	8.5%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	361	99.2%
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)	298	81.9%
Born in same state	258	70.9%
Born in different state	210	57.7%
Foreign born	40	11.0%
Naturalized citizen	66	18.1%
Not a US citizen	66	100.0%

Ancestry

Ancestry	Count	%
Italian	109	29.9%
Dutch	87	23.9%

Ancestry	Count	%
French	10	2.7%
Polish	2	0.5%

Technology access

Metric	% of households
Computer access	58.0%
Internet access	53.6%

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

Frequently asked questions about ZIP code 57738

What city is ZIP code 57738 in?

ZIP code 57738 is primarily assigned to Fairburn, South Dakota.

What county is ZIP code 57738 in?

ZIP code 57738 falls within Custer County, South Dakota.

Does ZIP code 57738 have a large retiree population?

89% of households in ZIP code 57738 receive Social Security income, suggesting a significant retiree or disability population.

Does ZIP code 57738 have an older population?

49% of residents in ZIP code 57738 are 65 or older, above the national average of ~17%.

How educated is the population of ZIP code 57738?

5% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.

Does ZIP code 57738 have a large veteran population?

25% of civilians in ZIP code 57738 are veterans, above the national average of ~7%.

What timezone is ZIP code 57738 in?

ZIP code 57738 observes the MST timezone.