57437 ZIP Code — Eureka, SD

Mcpherson County, South Dakota

ZIP code 57437 is located in Eureka, South Dakota, within Mcpherson County. It covers approximately 532.86 square miles and serves a population of 1,338 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 605.

About ZIP code 57437

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 $75,200. Owner-occupancy is high at 81%, well above the national average.

The gap between median ($43,750) and mean household income suggests income inequality — a small number of higher earners pull the average up. 51% 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 16 minutes is near the national average.

College attainment at 21% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 57437 reflects a community defined by high homeownership and a significant Social Security-dependent population.

1,338
population
532.86
sq mi land
Standard
ZIP type
Central (CT)
timezone
57437 ZIP code map
Cities in ZIP code 57437

Below are the cities the US Postal Service accepts for ZIP code 57437. Using any city not on this list may result in mail delivery delays.

City Status
Eureka Acceptable
Eureka Preferred
Nearby ZIP codes
57448 Hosmer (12.5 mi)
Demographics updated 05/2026
Population
Total population 1,338
Population density 3 / sq mi
State FIPS 46
County FIPS 089
Geography
Land area 532.86 sq mi
Water area 5.66 sq mi
Latitude 45.7671
Longitude -99.5726
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 58.4% 50.3% 41.7%
$50k – $100k 21.4% 27.5% 33.8%
$100k – $200k 14.3% 18.0% 20.1%
Over $200k 5.8% 4.2% 4.4%

Demographics & statistics

1,338
Population
3
People per sq mi
59.8
Median age
$43,750
Median household income
$42,294
Per capita income
$75,200
Median home value
$521
Median monthly rent
80.9%
Home ownership
15.3%
Poverty rate
0.0%
Unemployment
709
Housing units
20.5%
Bachelor's or higher

Age distribution

Male Female
19
Under 5
23
44
5–9
54
13
10–14
16
21
15–19
26
33
20–24
41
55
25–34
68
28
35–44
34
42
45–54
51
49
55–59
61
35
60–64
44
115
65–74
142
80
75–84
99
65
85+
80
← Male
Female →

Age summary

GroupCount%
Under 1820115.0%
18 and over1,13785.0%
65 and over58143.4%
Median age59.8 years

Race & ethnicity

White 93.7%
Black or African American 3.1%
Two or more races 2.2%
Asian 0.5%
Hispanic or Latino 0.1%
American Indian / Alaska Native 0.1%
Native Hawaiian / Pacific Islander 0.1%
GroupCount%
White1,25593.7%
Black or African American423.1%
Two or more races302.2%
Asian70.5%
Hispanic or Latino20.1%
American Indian / Alaska Native20.1%
Native Hawaiian / Pacific Islander20.1%

Household income

Income range This ZIP County avg State avg
Under $50k 58.4% 50.3% 41.7%
$50k – $100k 21.4% 27.5% 33.8%
$100k – $200k 14.3% 18.0% 20.1%
Over $200k 5.8% 4.2% 4.4%
Under $10k 8.2%
$10k–$15k 10.7%
$15k–$25k 13.1%
$25k–$35k 9.0%
$35k–$50k 14.1%
$50k–$75k 15.9%
$75k–$100k 8.4%
$100k–$150k 8.2%
$150k–$200k 4.0%
$200k+ 8.4%
Range% of households
Under $10k8.2%
$10k–$15k10.7%
$15k–$25k13.1%
$25k–$35k9.0%
$35k–$50k14.1%
$50k–$75k15.9%
$75k–$100k8.4%
$100k–$150k8.2%
$150k–$200k4.0%
$200k+8.4%
Median income$43,750

Housing

Home values

Under $50k 38.7%
$50k–$100k 25.7%
$100k–$150k 15.5%
$150k–$200k 5.2%
$200k–$300k 8.1%
$300k–$500k 4.6%
$500k–$1M 1.0%
$1M+ 1.2%

Housing overview

MetricValue
Median home value$75,200
Median rent / month$521
Owner occupied80.9%
Renter occupied19.1%
Vacant27.5%
Single-family detached88.3%
Large apartment buildings3.4%
Mobile homes1.3%
Median rooms6.3
Avg household size (owned)2.28

Year built

Era%
2020 or later0.0%
2010–20192.2%
2000–20093.5%
1990–19996.6%
1980–19894.0%
1970–19799.8%
1960–196918.2%
1950–195914.5%
1940–19496.8%
1939 or earlier34.4%

Bedrooms

Size% of units
No bedroom (studio)0.0%
1 bedroom11.4%
2 bedrooms26.0%
3 bedrooms41.4%
4 bedrooms13.2%
5+ bedrooms7.9%

Vehicles per household

Vehicles% of households
No vehicle4.9%
1 vehicle28.6%
2 vehicles32.2%
3 or more34.3%

Heating fuel

Fuel type%
Utility gas3.4%
Electricity24.5%
Propane / LP gas34.5%
Fuel oil32.8%
Wood2.5%
No fuel used0.3%

Households & families

Household typeCount%
Married-couple family27145.4%
Cohabiting couple213.5%
Male householder, no spouse15325.6%
Female householder, no spouse15225.5%
Households with children under 189616.1%
Households with seniors (65+)31753.1%
Average household size2.07

Marital status

StatusMaleFemale
Never married29.2%16.4%
Married55.5%48.2%
Separated0.0%1.0%
Widowed4.7%24.6%
Divorced10.6%9.8%

Education

Less than 9th grade 12.7%
Some HS, no diploma 5.7%
HS graduate 40.2%
Some college, no degree 11.2%
Associate's degree 9.7%
Bachelor's degree 16.1%
Graduate / professional 4.4%
Metric%
HS diploma or higher81.6%
Bachelor's or higher20.5%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool147.3%
Kindergarten6634.4%
Elementary school6131.8%
High school3216.7%
College / grad school199.9%

Employment

Industry of employment

Education & healthcare 34.0%
Agriculture & mining 24.9%
Retail trade 9.9%
Construction 9.1%
Professional & management 4.9%
Public administration 4.2%
Wholesale trade 3.5%
Finance & real estate 2.9%
Arts, food & hospitality 2.6%
Manufacturing 2.0%
Transportation & utilities 1.1%
Other services 0.5%
Information 0.4%

Occupation

Category%
Management, business & arts43.3%
Service19.4%
Sales & office14.4%
Natural resources & construction15.9%
Production & transportation6.9%

Employment type

Type%
Private sector63.1%
Government18.1%
Self-employed18.8%
Unpaid family workers0.0%

Commute

Method%
Drive alone81.1%
Carpool3.5%
Public transit0.0%
Walk6.4%
Work from home8.2%
Other means0.7%
Avg commute (minutes)16.1

Poverty

All people 15.3%
Under 18 years 14.4%
18 and over 15.5%
Married-couple families 8.9%
Female-led households 19.4%

Income support

Source% of households
Social Security50.8%
Retirement income12.7%
Supplemental Security2.7%
Cash public assistance2.2%
Food stamps / SNAP4.4%

Health indicators

Condition%
Obesity34.6%
High blood pressure43.4%
High cholesterol39.0%
Diabetes13.6%
Heart disease12.2%
Stroke5.5%
Asthma8.7%
Arthritis36.0%
Kidney disease4.8%
Pulmonary disease9.6%
Cancer11.9%
Behavior / access%
Smoking16.3%
Binge drinking13.2%
No physical activity30.4%
Less than 7 hrs sleep26.0%
Depression13.7%
Fair or poor health16.2%
Poor mental health9.0%
Poor physical health11.9%
No health insurance12.2%
Visited doctor (checkup)81.5%
Visited dentist67.0%
Cholesterol screening93.4%
Teeth loss18.1%

Veterans & disability

VeteransCount%
Civilian veterans11810.4%
Disability%
Any disability16.3%
Under 181.5%
18–64 years11.0%
65 and over28.7%

Health insurance coverage

Type%
Private insurance61.4%
Public insurance44.8%
No insurance8.2%
Uninsured under 1912.9%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only1,29696.9%
Spanish433.3%
Other Indo-European00.0%
Asian & Pacific Islander433.3%
Other languages00.0%

Place of birth & citizenship

OriginCount%
Native born (US)1,31598.3%
Born in same state1,31598.3%
Born in different state96271.9%
Foreign born00.0%
Naturalized citizen231.7%
Not a US citizen730.4%

Ancestry

AncestryCount%
Italian1067.9%
Polish997.4%
Arab544%
French513.8%
AncestryCount%
Dutch181.3%
English60.4%
German50.4%

Technology access

Metric% of households
Computer access44.6%
Internet access77.7%

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

Frequently asked questions about ZIP code 57437

What city is ZIP code 57437 in?

ZIP code 57437 is primarily assigned to Eureka, South Dakota.

What county is ZIP code 57437 in?

ZIP code 57437 falls within Mcpherson County, South Dakota.

Does ZIP code 57437 have an older population?

43% of residents in ZIP code 57437 are 65 or older, above the national average of ~17%.

Does ZIP code 57437 have a large retiree population?

51% of households in ZIP code 57437 receive Social Security income, suggesting a significant retiree or disability population.

Is ZIP code 57437 mostly owner-occupied?

81% of occupied units in ZIP code 57437 are owner-occupied, well above the national average.

What is the poverty rate in ZIP code 57437?

15% of residents in ZIP code 57437 live below the poverty line, above the national average.

What timezone is ZIP code 57437 in?

ZIP code 57437 observes the CST timezone.

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