57359 ZIP Code — Letcher, SD

Sanborn County, South Dakota

ZIP code 57359 is located in Letcher, South Dakota, within Sanborn County. It covers approximately 153.91 square miles and serves a population of 612 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 605.

About ZIP code 57359

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 $158,600. Owner-occupancy is high at 83%, well above the national average.

Median household income is $90,000. The poverty rate of 6% is below the national average. 33% 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 20 minutes is near the national average. Remote work is prevalent — 20% of workers work from home.

Educational attainment is near the national average, with 23% of residents holding a bachelor's degree or higher.

Overall, ZIP code 57359 reflects a community defined by high homeownership, a high rate of remote workers, and a significant Social Security-dependent population.

612
population
153.91
sq mi land
Standard
ZIP type
Central (CT)
timezone
57359 ZIP code map
Cities in ZIP code 57359

Below are the cities the US Postal Service accepts for ZIP code 57359. Using any city not on this list may result in mail delivery delays.

City Status
Letcher Acceptable
Letcher Preferred
Nearby ZIP codes
57385 Woonsocket (11.7 mi) 57314 Artesian (13.5 mi) 57363 Mount Vernon (14.8 mi) 57301 Mitchell (15 mi) 57368 Plankinton (17.1 mi) 57340 Fulton (18.7 mi)
Demographics updated 05/2026
Population
Total population 612
Population density 4 / sq mi
State FIPS 46
County FIPS 111
Geography
Land area 153.91 sq mi
Water area 0.07 sq mi
Latitude 43.8997
Longitude -98.1911
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 29.3% 44.1% 41.7%
$50k – $100k 53.7% 35.9% 33.8%
$100k – $200k 13.1% 16.6% 20.1%
Over $200k 3.9% 3.5% 4.4%

Demographics & statistics

612
Population
4
People per sq mi
38.4
Median age
$90,000
Median household income
$41,601
Per capita income
$158,600
Median home value
$935
Median monthly rent
82.8%
Home ownership
5.6%
Poverty rate
1.2%
Unemployment
246
Housing units
22.5%
Bachelor's or higher

Age distribution

Male Female
17
Under 5
14
36
5–9
29
19
10–14
16
28
15–19
22
10
20–24
8
45
25–34
36
40
35–44
33
52
45–54
41
15
55–59
12
19
60–64
16
38
65–74
31
14
75–84
12
5
85+
4
← Male
Female →

Age summary

GroupCount%
Under 1816026.1%
18 and over45273.9%
65 and over10417.0%
Median age38.4 years

Race & ethnicity

White 86.2%
Hispanic or Latino 5.3%
Other race 4.6%
Two or more races 3.9%
GroupCount%
White55786.2%
Hispanic or Latino345.3%
Other race304.6%
Two or more races253.9%

Household income

Income range This ZIP County avg State avg
Under $50k 29.3% 44.1% 41.7%
$50k – $100k 53.7% 35.9% 33.8%
$100k – $200k 13.1% 16.6% 20.1%
Over $200k 3.9% 3.5% 4.4%
Under $10k 2.2%
$10k–$15k 3.4%
$15k–$25k 7.3%
$25k–$35k 0.4%
$35k–$50k 8.6%
$50k–$75k 23.7%
$75k–$100k 16.4%
$100k–$150k 11.2%
$150k–$200k 17.2%
$200k+ 9.5%
Range% of households
Under $10k2.2%
$10k–$15k3.4%
$15k–$25k7.3%
$25k–$35k0.4%
$35k–$50k8.6%
$50k–$75k23.7%
$75k–$100k16.4%
$100k–$150k11.2%
$150k–$200k17.2%
$200k+9.5%
Median income$90,000

Housing

Home values

Under $50k 16.1%
$50k–$100k 11.5%
$100k–$150k 16.1%
$150k–$200k 20.3%
$200k–$300k 17.2%
$300k–$500k 9.4%
$500k–$1M 5.2%
$1M+ 4.2%

Housing overview

MetricValue
Median home value$158,600
Median rent / month$935
Owner occupied82.8%
Renter occupied17.2%
Vacant18.9%
Single-family detached91.6%
Large apartment buildings0.0%
Mobile homes4.2%
Median rooms7.1
Avg household size (owned)2.52

Year built

Era%
2020 or later0.0%
2010–20190.0%
2000–20099.1%
1990–19994.2%
1980–19899.1%
1970–19799.8%
1960–19698.7%
1950–19595.9%
1940–19498.0%
1939 or earlier45.1%

Bedrooms

Size% of units
No bedroom (studio)0.0%
1 bedroom4.5%
2 bedrooms17.8%
3 bedrooms44.1%
4 bedrooms30.8%
5+ bedrooms2.8%

Vehicles per household

Vehicles% of households
No vehicle5.6%
1 vehicle13.8%
2 vehicles37.1%
3 or more43.5%

Heating fuel

Fuel type%
Utility gas0.9%
Electricity22.8%
Propane / LP gas70.3%
Fuel oil3.4%
No fuel used1.3%

Households & families

Household typeCount%
Married-couple family14060.3%
Cohabiting couple166.9%
Male householder, no spouse2510.8%
Female householder, no spouse5122.0%
Households with children under 189239.7%
Households with seniors (65+)7934.1%
Average household size2.64

Marital status

StatusMaleFemale
Never married33.9%15.6%
Married48.2%61.2%
Separated0.0%0.0%
Widowed1.2%12.5%
Divorced16.7%10.7%

Education

Less than 9th grade 0.7%
Some HS, no diploma 2.9%
HS graduate 32.9%
Some college, no degree 19.4%
Associate's degree 21.5%
Bachelor's degree 19.1%
Graduate / professional 3.4%
Metric%
HS diploma or higher96.4%
Bachelor's or higher22.5%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool84.6%
Kindergarten10.6%
Elementary school9353.1%
High school3620.6%
College / grad school3721.1%

Employment

Industry of employment

Education & healthcare 23.2%
Agriculture & mining 17.6%
Transportation & utilities 12.6%
Manufacturing 9.4%
Public administration 8.8%
Professional & management 8.2%
Construction 5.9%
Arts, food & hospitality 5.6%
Other services 5.6%
Retail trade 2.3%
Wholesale trade 0.6%
Finance & real estate 0.3%

Occupation

Category%
Management, business & arts47.8%
Service9.1%
Sales & office11.4%
Natural resources & construction13.5%
Production & transportation18.2%

Employment type

Type%
Private sector60.1%
Government22.9%
Self-employed16.4%
Unpaid family workers0.6%

Commute

Method%
Drive alone68.6%
Carpool7.3%
Public transit0.0%
Walk1.2%
Work from home20.2%
Other means2.6%
Avg commute (minutes)20.1

Poverty

All people 5.6%
Under 18 years 5.8%
18 and over 5.5%
Married-couple families 0.0%
Female-led households 16.0%

Income support

Source% of households
Social Security32.8%
Retirement income15.5%
Supplemental Security1.3%
Cash public assistance4.3%
Food stamps / SNAP4.7%

Health indicators

Condition%
Obesity34.4%
High blood pressure32.2%
High cholesterol32.0%
Diabetes9.4%
Heart disease7.0%
Stroke3.1%
Asthma8.6%
Arthritis24.7%
Kidney disease2.9%
Pulmonary disease6.1%
Cancer7.6%
Behavior / access%
Smoking17.7%
Binge drinking19.4%
No physical activity22.4%
Less than 7 hrs sleep27.9%
Depression15.2%
Fair or poor health11.2%
Poor mental health10.3%
Poor physical health8.9%
No health insurance11.4%
Visited doctor (checkup)75.0%
Visited dentist68.0%
Cholesterol screening89.9%
Teeth loss12.9%

Veterans & disability

VeteransCount%
Civilian veterans265.8%
Disability%
Any disability7.2%
Under 181.3%
18–64 years2.6%
65 and over31.7%

Health insurance coverage

Type%
Private insurance78.4%
Public insurance21.4%
No insurance9.0%
Uninsured under 1912.7%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only58194.9%
Spanish223.8%
Other Indo-European223.8%
Asian & Pacific Islander00.0%
Other languages00.0%

Place of birth & citizenship

OriginCount%
Native born (US)60899.3%
Born in same state60899.3%
Born in different state48579.2%
Foreign born00.0%
Naturalized citizen40.7%
Not a US citizen250.0%

Ancestry

AncestryCount%
Polish12720.8%
Italian416.7%
French315.1%
AncestryCount%
Dutch223.6%
Arab132.1%
English91.5%

Technology access

Metric% of households
Computer access37.9%
Internet access88.8%

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

Frequently asked questions about ZIP code 57359

What city is ZIP code 57359 in?

ZIP code 57359 is primarily assigned to Letcher, South Dakota.

What county is ZIP code 57359 in?

ZIP code 57359 falls within Sanborn County, South Dakota.

Is ZIP code 57359 mostly owner-occupied?

83% of occupied units in ZIP code 57359 are owner-occupied, well above the national average.

What is the typical home value in ZIP code 57359?

The median home value in ZIP code 57359 is $158,600.

What is the population of ZIP code 57359?

ZIP code 57359 has an estimated population of 612 residents, with a density of 4 people per square mile.

What is the median household income in ZIP code 57359?

The median household income in ZIP code 57359 is $90,000, above the national median of ~$75,000.

What timezone is ZIP code 57359 in?

ZIP code 57359 observes the CST timezone.

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