ZipCodeLook
57421

Zip code 57421: Amherst, South Dakota

Residential delivery areaMarshall CountyCentral Time
Population
75
Small sample: rough estimates
Median household income
—
U.S. $81K
Median home value
—
U.S. $333K
Median rent
—
U.S. $1,413
Median age
16.6
U.S. 38.9
Land area
33 sq mi
2 people/sq mi

Boundary is the Census Bureau's ZIP Code Tabulation Area, which closely tracks the postal delivery area.

About 57421

57421 is a rural zip code in Amherst, South Dakota (Marshall County), covering 33 sq mi of land. About 75 people live here, or 2 per square mile. The median resident is 16.6 years old, compared with 38.9 nationally. With so few residents, the Census figures below are rough estimates with wide margins of error.

0% of residents live below the poverty line (U.S.: 12.5%). 100% of occupied homes are lived in by their owners.

91% of adults hold a bachelor's degree or higher (U.S.: 36%).

How 57421 compares

Sorted from highest to lowest national percentile

Only about 75 people live here, so these survey estimates have wide margins of error.

The percentile is the share of Americans who live in a zip code with a lower value, so the 50th percentile is typical. Rank 1 is the highest value in the state. Both include zip codes with at least 100 residents. Strengths and weaknesses mark measures in the best or worst fifth nationally, where higher or lower is clearly better (income, poverty, education, commute, broadband, insurance and similar). Measures like age or density are left unmarked.

People

Age

Median age
16.6
Under 18
56%
65 and over
4%

Race and ethnicity

  • White100%
  • Black0%
  • Hispanic0%
  • Asian0%
  • Native American0%
  • Pacific Islander0%
  • Other0%
  • Multiracial0%
Diversity index
0
U.S. 61.4
Foreign-born
0%
U.S. 14.1%
Born in state
28%

Language spoken at home (households)

English only
100%
Spanish
0%
Other Indo-European
0%
Asian / Pacific
0%
Other
0%

Households

Households
18
Average household size
4.2
Family households
100%
Married couples
100%
Living alone
0%
Veterans (of adults)
0%
Male / female
40% / 60%

Income and poverty

Household income distribution

<$25k
0%
$25–50k
0%
$50–75k
0%
$75–100k
0%
$100–150k
17%
$150–200k
83%
$200k+
0%

Median household income

57421
—
Marshall Co.
$78,156
South Dakota
$75,081
United States
$80,734
Per capita income
$33,005
U.S. $44,673
Poverty rate
0%
U.S. 12.5%
Households earning $150K+
83.3%
U.S. 23%
Income inequality (Gini)
0.053
U.S. 0.483

Housing

Median home value

57421
—
Marshall Co.
$156,500
South Dakota
$257,400
United States
$332,700

Median gross rent

57421
—
Marshall Co.
$752
South Dakota
$946
United States
$1,413

Types of housing

Single-family
100%
2–4 units
0%
5–19 units
0%
20+ units
0%
Mobile home
0%
Boat, RV, van
0%
Housing units
26
Owner-occupied
100%
Vacant
30.8%
Median year built
1943
Median rooms
7.4
Renters paying 30%+ of income
—
Renters paying 50%+ of income
—
Home value to income
—

Work and commute

How people get to work

Drove alone
44%
Carpooled
0%
Transit
0%
Walked
0%
Bicycle
0%
Worked from home
56%
Other
0%

Commute time (one way)

<10 min
0%
10–19
0%
20–29
0%
30–44
0%
45–59
100%
60+
0%
Average commute
—
U.S. 26.4 min
Unemployment
0%
U.S. 5.2%
In labor force
60%
U.S. 63.5%

Jobs and careers

What employed residents do, wherever they work

Occupations

Computer and math
56%
Education
44%
Management
0%
Business and finance
0%
Engineering and science
0%
Legal and social services
0%
Arts, media and sports
0%
Healthcare
0%
Police and fire
0%
Food service
0%
Cleaning and personal care
0%
Sales
0%
Office and admin
0%
Construction and repair
0%
Farming, fishing and forestry
0%
Production
0%
Transportation and moving
0%

Industries

Other services
56%
Education
44%
Health care and social assistance
0%
Retail
0%
Manufacturing
0%
Professional and technical services
0%
Construction
0%
Restaurants and hotels
0%
Finance, insurance and real estate
0%
Transportation, warehousing and utilities
0%
Public administration
0%
Admin, support and management
0%
Wholesale
0%
Information
0%
Arts and recreation
0%
Agriculture and mining
0%
Median earnings per worker
—
U.S. $49,666
Self-employed
0%
U.S. 10%
Government workers
44.4%
U.S. 14.5%
Nonprofit workers
55.6%
U.S. 8.8%

Median earnings by type of work

Type of work57421U.S.
Management, business, science and arts—$74,888
Service—$26,804
Sales and office—$40,476
Construction and maintenance—$49,199
Production and transportation—$39,989

Education, internet and health coverage

Highest education (adults 25+)

No diploma
0%
High school
0%
Some college
0%
Associate's
9%
Bachelor's
45%
Graduate
45%
High school graduate or higher
100%
Bachelor's degree or higher
90.9%
Graduate or professional degree
45.5%
Households with broadband
100%
Cable, fiber or DSL
100%
No internet access
0%
Without health insurance
0%
Limited-English households
0%

Geography

City (USPS)
Amherst
Center point
45.7555° N, 97.9071° W
Land area
33 sq mi
Water area
0.1 sq mi
Time zone
Central Time (UTC-6, UTC-5 in summer)
Zip type
Residential delivery area

Zip codes near 57421

ZipCityDistanceIncome
57432Claremont7.8 mi$112,765
57430Britton11 mi$70,484
57454Langford12 mi$81,250
57449Houghton13 mi$150,000
57446Hecla14 mi$44,375
57468Pierpont20 mi$76,250
58017Cogswell20 mi$61,250
57433Columbia22 mi$50,417
57247Lake City22 mi$50,455
57445Groton22 mi$84,948
57422Andover23 mi$88,125
58043Havana23 mi$130,694

Questions about 57421

What city is zip code 57421?

57421 is assigned to Amherst, South Dakota. The city name is the one the Postal Service prefers for mail addressed to this zip code.

What county is 57421 in?

57421 is in Marshall County, South Dakota.

What is the population of 57421?

About 75 people live in 57421, according to the Census Bureau's American Community Survey.

What time zone is 57421 in?

57421 is in Central Time.

What zip codes are near 57421?

The closest zip codes to 57421 are 57432, 57430, 57454, 57449, 57446.

Demographic figures are 2020–2024 American Community Survey 5-year estimates for ZIP Code Tabulation Area 57421, from the U.S. Census Bureau. Small areas have wide margins of error. How we build these numbers.