57312 ZIP Code — Alpena, SD

Jerauld County, South Dakota

ZIP code 57312 is located in Alpena, South Dakota, within Jerauld County. It covers approximately 130.28 square miles and serves a population of 673 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 605.

About ZIP code 57312

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Owner-occupancy is high at 89%, well above the national average.

The gap between median ($85,208) and mean household income suggests income inequality — a small number of higher earners pull the average up. 35% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with manufacturing as the leading industry. The average commute of 14 minutes is near the national average.

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

Overall, ZIP code 57312 reflects a community defined by a trades-oriented workforce, high homeownership, and a significant Social Security-dependent population.

673

population

130.28

sq mi land

Standard

ZIP type

Central (CT)

timezone

57312 ZIP code map

Cities in ZIP code 57312

Below are the cities the US Postal Service accepts for ZIP code 57312. Using any city not on this list may result in mail delivery delays.

City	Status
Alpena	Preferred

Nearby ZIP codes

57385 Woonsocket (10.8 mi) 57399 Huron (14.9 mi) 57382 Wessington Springs (15.5 mi) 57384 Wolsey (16.7 mi) 57350 Huron (16.9 mi) 57324 Cavour (19.8 mi)

Demographics updated 05/2026

Population
Total population	673
Population density	5 / sq mi
State FIPS	46
County FIPS	073

Geography
Land area	130.28 sq mi
Water area	0.60 sq mi
Latitude	44.1902
Longitude	-98.3925
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	43.4%	48.9%	41.7%
$50k – $100k	31.9%	28.4%	33.8%
$100k – $200k	17.9%	18.4%	20.1%
Over $200k	6.8%	4.3%	4.4%

Demographics & statistics

673

Population

People per sq mi

46.0

Median age

$85,208

Median household income

$47,014

Per capita income

Median home value

$794

Median monthly rent

88.8%

Home ownership

13.0%

Poverty rate

0.0%

Unemployment

249

Housing units

5.0%

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	171	25.4%
18 and over	502	74.6%
65 and over	156	23.2%
Median age	46.0 years

Race & ethnicity

White 73.8%

Hispanic or Latino 9.5%

Other race 8.9%

Two or more races 4.8%

American Indian / Alaska Native 3%

Group	Count	%
White	549	73.8%
Hispanic or Latino	71	9.5%
Other race	66	8.9%
Two or more races	36	4.8%
American Indian / Alaska Native	22	3%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	43.4%	48.9%	41.7%
$50k – $100k	31.9%	28.4%	33.8%
$100k – $200k	17.9%	18.4%	20.1%
Over $200k	6.8%	4.3%	4.4%

Under $10k 1.4%

$10k–$15k 0.4%

$15k–$25k 6.2%

$25k–$35k 8.7%

$35k–$50k 17.8%

$50k–$75k 10.5%

$75k–$100k 15.2%

$100k–$150k 26.4%

$150k–$200k 3.3%

$200k+ 10.1%

Range	% of households
Under $10k	1.4%
$10k–$15k	0.4%
$15k–$25k	6.2%
$25k–$35k	8.7%
$35k–$50k	17.8%
$50k–$75k	10.5%
$75k–$100k	15.2%
$100k–$150k	26.4%
$150k–$200k	3.3%
$200k+	10.1%
Median income	$85,208

Housing

Home values

Under $50k 36.3%

$50k–$100k 16.3%

$100k–$150k 7.3%

$150k–$200k 20.4%

$200k–$300k 4.1%

$300k–$500k 14.3%

$1M+ 1.2%

Housing overview

Metric	Value
Median home value	$0
Median rent / month	$794
Owner occupied	88.8%
Renter occupied	11.2%
Vacant	1.4%
Single-family detached	89.3%
Large apartment buildings	0.0%
Mobile homes	10.7%
Median rooms	5.8
Avg household size (owned)	2.42

Year built

Era	%
2020 or later	0.0%
2010–2019	5.4%
2000–2009	9.3%
1990–1999	11.1%
1980–1989	0.0%
1970–1979	11.4%
1960–1969	2.1%
1950–1959	19.3%
1940–1949	15.7%
1939 or earlier	25.7%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	3.2%
2 bedrooms	24.3%
3 bedrooms	50.0%
4 bedrooms	19.3%
5+ bedrooms	3.2%

Vehicles per household

Vehicles	% of households
No vehicle	0.7%
1 vehicle	10.9%
2 vehicles	37.0%
3 or more	51.4%

Heating fuel

Fuel type	%
Utility gas	1.8%
Electricity	22.1%
Propane / LP gas	56.2%
Fuel oil	2.2%
No fuel used	5.1%

Households & families

Household type	Count	%
Married-couple family	212	76.8%
Cohabiting couple	7	2.5%
Male householder, no spouse	28	10.1%
Female householder, no spouse	29	10.5%
Households with children under 18	117	42.4%
Households with seniors (65+)	95	34.4%
Average household size	2.44

Marital status

Status	Male	Female
Never married	12.5%	11.9%
Married	78.6%	75.4%
Separated	1.6%	0.4%
Widowed	1.6%	1.8%
Divorced	5.6%	10.5%

Education

Less than 9th grade 4.2%

Some HS, no diploma 8.6%

HS graduate 45.0%

Some college, no degree 20.3%

Associate's degree 16.9%

Bachelor's degree 1.9%

Graduate / professional 3.1%

Metric	%
HS diploma or higher	87.2%
Bachelor's or higher	5.0%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	6	3.3%
Kindergarten	2	1.1%
Elementary school	109	60.6%
High school	48	26.7%
College / grad school	15	8.3%

Employment

Industry of employment

Manufacturing 20.3%

Agriculture & mining 15.4%

Transportation & utilities 13.5%

Other services 12.9%

Education & healthcare 9.3%

Construction 9.0%

Finance & real estate 7.7%

Wholesale trade 3.9%

Retail trade 3.9%

Arts, food & hospitality 1.9%

Professional & management 1.6%

Public administration 0.6%

Occupation

Category	%
Management, business & arts	42.4%
Service	4.8%
Sales & office	16.1%
Natural resources & construction	19.6%
Production & transportation	17.0%

Employment type

Type	%
Private sector	77.2%
Government	5.8%
Self-employed	17.0%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	80.9%
Carpool	5.5%
Public transit	0.0%
Walk	5.2%
Work from home	7.8%
Other means	0.6%
Avg commute (minutes)	14.4

Poverty

All people 13.0%

Under 18 years 23.4%

18 and over 9.6%

Married-couple families 6.1%

Female-led households 60.0%

Income support

Source	% of households
Social Security	34.8%
Retirement income	5.8%
Supplemental Security	0.0%
Cash public assistance	1.4%
Food stamps / SNAP	1.8%

Health indicators

Condition	%
Obesity	34.5%
High blood pressure	30.6%
High cholesterol	31.7%
Diabetes	9.0%
Heart disease	6.8%
Stroke	2.9%
Asthma	8.5%
Arthritis	22.8%
Kidney disease	2.8%
Pulmonary disease	5.6%
Cancer	7.1%

Behavior / access	%
Smoking	16.6%
Binge drinking	19.7%
No physical activity	22.2%
Less than 7 hrs sleep	27.6%
Depression	14.8%
Fair or poor health	11.0%
Poor mental health	10.2%
Poor physical health	8.4%
No health insurance	14.0%
Visited doctor (checkup)	73.6%
Visited dentist	68.4%
Cholesterol screening	89.4%
Teeth loss	12.5%

Veterans & disability

Veterans	Count	%
Civilian veterans	44	8.8%

Disability	%
Any disability	9.2%
Under 18	7.6%
18–64 years	6.9%
65 and over	16.0%

Health insurance coverage

Type	%
Private insurance	72.8%
Public insurance	32.8%
No insurance	4.8%
Uninsured under 19	5.1%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	664	98.7%
Spanish	21	3.2%
Other Indo-European	17	2.6%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	603	89.6%
Born in same state	599	89.0%
Born in different state	433	64.3%
Foreign born	4	0.6%
Naturalized citizen	70	10.4%
Not a US citizen	34	48.6%

Ancestry

Ancestry	Count	%
Polish	192	28.5%
Italian	117	17.4%
Arab	113	16.8%
Dutch	31	4.6%

Ancestry	Count	%
French	29	4.3%
English	21	3.1%
Irish	1	0.1%

Technology access

Metric	% of households
Computer access	41.0%
Internet access	97.1%

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

Frequently asked questions about ZIP code 57312

What city is ZIP code 57312 in?

ZIP code 57312 is primarily assigned to Alpena, South Dakota.

What county is ZIP code 57312 in?

ZIP code 57312 falls within Jerauld County, South Dakota.

How educated is the population of ZIP code 57312?

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

Is ZIP code 57312 mostly owner-occupied?

89% of occupied units in ZIP code 57312 are owner-occupied, well above the national average.

What is the population of ZIP code 57312?

ZIP code 57312 has an estimated population of 673 residents, with a density of 5 people per square mile.

What is the median household income in ZIP code 57312?

The median household income in ZIP code 57312 is $85,208, above the national median of ~$75,000.

What timezone is ZIP code 57312 in?

ZIP code 57312 observes the CST timezone.