57430 ZIP Code — Britton, SD

Marshall County, South Dakota

ZIP code 57430 is located in Britton, South Dakota, within Marshall County. It covers approximately 346.75 square miles and serves a population of 1,900 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 605.

About ZIP code 57430

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 $116,200. Owner-occupancy is high at 79%, well above the national average.

Median household income is $74,917. 41% 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 9 minutes is near the national average.

Educational attainment is near the national average, with 22% of residents holding a bachelor's degree or higher.

Overall, ZIP code 57430 reflects a community defined by high homeownership and a significant Social Security-dependent population.

1,900

population

346.75

sq mi land

Standard

ZIP type

Central (CT)

timezone

57430 ZIP code map

Cities in ZIP code 57430

Below are the cities the US Postal Service accepts for ZIP code 57430. Using any city not on this list may result in mail delivery delays.

City	Status
Britton	Acceptable
Britton	Preferred

Nearby ZIP codes

57454 Langford (12.5 mi) 58043 Havana (16.1 mi) 57247 Lake City (16.5 mi) 57432 Claremont (16.6 mi) 57270 Veblen (17.3 mi) 57261 Roslyn (18.6 mi) 58032 Forman (19.4 mi) 58017 Cogswell (19.6 mi)

Demographics updated 05/2026

Population
Total population	1,900
Population density	5 / sq mi
State FIPS	46
County FIPS	091

Geography
Land area	346.75 sq mi
Water area	3.47 sq mi
Latitude	45.7907
Longitude	-97.7091
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	28.4%	34.6%	41.7%
$50k – $100k	46.8%	39.5%	33.8%
$100k – $200k	21.5%	20.8%	20.1%
Over $200k	3.3%	5.1%	4.4%

Demographics & statistics

1,900

Population

People per sq mi

47.5

Median age

$74,917

Median household income

$39,806

Per capita income

$116,200

Median home value

$779

Median monthly rent

78.6%

Home ownership

9.2%

Poverty rate

0.6%

Unemployment

846

Housing units

22.4%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

106

25–34

100

101

35–44

106

45–54

101

55–59

60–64

125

65–74

119

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	358	18.8%
18 and over	1,542	81.2%
65 and over	471	24.8%
Median age	47.5 years

Race & ethnicity

White 90%

Two or more races 4.3%

American Indian / Alaska Native 3%

Hispanic or Latino 2.5%

Black or African American 0.3%

Group	Count	%
White	1,753	90%
Two or more races	83	4.3%
American Indian / Alaska Native	59	3%
Hispanic or Latino	48	2.5%
Black or African American	5	0.3%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	28.4%	34.6%	41.7%
$50k – $100k	46.8%	39.5%	33.8%
$100k – $200k	21.5%	20.8%	20.1%
Over $200k	3.3%	5.1%	4.4%

Under $10k 2.3%

$10k–$15k 3.6%

$15k–$25k 3.7%

$25k–$35k 7.0%

$35k–$50k 16.0%

$50k–$75k 17.5%

$75k–$100k 19.6%

$100k–$150k 18.2%

$150k–$200k 7.9%

$200k+ 4.3%

Range	% of households
Under $10k	2.3%
$10k–$15k	3.6%
$15k–$25k	3.7%
$25k–$35k	7.0%
$35k–$50k	16.0%
$50k–$75k	17.5%
$75k–$100k	19.6%
$100k–$150k	18.2%
$150k–$200k	7.9%
$200k+	4.3%
Median income	$74,917

Housing

Home values

Under $50k 21.4%

$50k–$100k 22.7%

$100k–$150k 12.2%

$150k–$200k 14.6%

$200k–$300k 17.8%

$300k–$500k 6.3%

$500k–$1M 5.0%

Housing overview

Metric	Value
Median home value	$116,200
Median rent / month	$779
Owner occupied	78.6%
Renter occupied	21.4%
Vacant	20.3%
Single-family detached	80.0%
Large apartment buildings	3.2%
Mobile homes	6.4%
Median rooms	6.3
Avg household size (owned)	2.38

Year built

Era	%
2020 or later	0.0%
2010–2019	1.7%
2000–2009	10.7%
1990–1999	2.9%
1980–1989	4.8%
1970–1979	19.7%
1960–1969	7.8%
1950–1959	5.8%
1940–1949	3.6%
1939 or earlier	42.9%

Bedrooms

Size	% of units
No bedroom (studio)	1.1%
1 bedroom	11.3%
2 bedrooms	21.7%
3 bedrooms	39.7%
4 bedrooms	18.1%
5+ bedrooms	8.1%

Vehicles per household

Vehicles	% of households
No vehicle	1.4%
1 vehicle	31.9%
2 vehicles	27.1%
3 or more	39.7%

Heating fuel

Fuel type	%
Utility gas	3.8%
Electricity	30.6%
Propane / LP gas	43.3%
Fuel oil	18.0%
No fuel used	1.0%

Households & families

Household type	Count	%
Married-couple family	438	53.9%
Cohabiting couple	11	1.4%
Male householder, no spouse	152	18.7%
Female householder, no spouse	212	26.1%
Households with children under 18	130	16.0%
Households with seniors (65+)	349	42.9%
Average household size	2.18

Marital status

Status	Male	Female
Never married	22.0%	15.6%
Married	60.2%	53.4%
Separated	0.0%	0.0%
Widowed	6.7%	26.2%
Divorced	11.1%	4.7%

Education

Less than 9th grade 7.9%

Some HS, no diploma 1.7%

HS graduate 30.8%

Some college, no degree 21.1%

Associate's degree 16.1%

Bachelor's degree 19.5%

Graduate / professional 2.9%

Metric	%
HS diploma or higher	90.4%
Bachelor's or higher	22.4%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	12	3.3%
Kindergarten	9	2.5%
Elementary school	160	44.4%
High school	100	27.8%
College / grad school	79	21.9%

Employment

Industry of employment

Education & healthcare 19.3%

Manufacturing 16.9%

Transportation & utilities 12.6%

Agriculture & mining 10.6%

Construction 9.2%

Retail trade 8.1%

Finance & real estate 4.9%

Professional & management 4.5%

Wholesale trade 3.8%

Public administration 3.3%

Arts, food & hospitality 3.2%

Information 2.6%

Other services 0.8%

Occupation

Category	%
Management, business & arts	28.7%
Service	15.1%
Sales & office	19.4%
Natural resources & construction	18.2%
Production & transportation	18.6%

Employment type

Type	%
Private sector	80.7%
Government	9.8%
Self-employed	8.2%
Unpaid family workers	1.3%

Commute

Method	%
Drive alone	82.7%
Carpool	2.9%
Public transit	4.1%
Walk	7.0%
Work from home	1.8%
Other means	1.4%
Avg commute (minutes)	9.4

Poverty

All people 9.2%

Under 18 years 8.7%

18 and over 9.3%

Married-couple families 0.9%

Female-led households 39.1%

Income support

Source	% of households
Social Security	40.8%
Retirement income	21.8%
Supplemental Security	0.0%
Cash public assistance	0.0%
Food stamps / SNAP	2.5%

Health indicators

Condition	%
Obesity	32.0%
High blood pressure	33.2%
High cholesterol	32.8%
Diabetes	9.6%
Heart disease	7.9%
Stroke	3.5%
Asthma	8.6%
Arthritis	26.6%
Kidney disease	3.3%
Pulmonary disease	6.4%
Cancer	8.6%

Behavior / access	%
Smoking	16.1%
Binge drinking	19.4%
No physical activity	22.3%
Less than 7 hrs sleep	26.2%
Depression	14.7%
Fair or poor health	11.4%
Poor mental health	10.1%
Poor physical health	9.0%
No health insurance	11.1%
Visited doctor (checkup)	76.1%
Visited dentist	68.5%
Cholesterol screening	90.0%
Teeth loss	13.2%

Veterans & disability

Veterans	Count	%
Civilian veterans	132	8.6%

Disability	%
Any disability	12.6%
Under 18	0.8%
18–64 years	11.5%
65 and over	25.3%

Health insurance coverage

Type	%
Private insurance	81.8%
Public insurance	31.6%
No insurance	2.2%
Uninsured under 19	2.1%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	1,805	95.0%
Spanish	12	0.7%
Other Indo-European	1	0.1%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	1,898	99.9%
Born in same state	1,898	99.9%
Born in different state	1,577	83.0%
Foreign born	0	0.0%
Naturalized citizen	2	0.1%
Not a US citizen	1	50.0%

Ancestry

Ancestry	Count	%
Polish	524	27.6%
Italian	113	5.9%
Arab	102	5.4%
French	98	5.2%

Ancestry	Count	%
German	14	0.7%
Irish	11	0.6%
Dutch	2	0.1%

Technology access

Metric	% of households
Computer access	42.8%
Internet access	92.0%

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

Frequently asked questions about ZIP code 57430

What city is ZIP code 57430 in?

ZIP code 57430 is primarily assigned to Britton, South Dakota.

What county is ZIP code 57430 in?

ZIP code 57430 falls within Marshall County, South Dakota.

Does ZIP code 57430 have a large retiree population?

41% of households in ZIP code 57430 receive Social Security income, suggesting a significant retiree or disability population.

What is the typical home value in ZIP code 57430?

The median home value in ZIP code 57430 is $116,200.

What is the population of ZIP code 57430?

ZIP code 57430 has an estimated population of 1,900 residents, with a density of 5 people per square mile.

What is the median household income in ZIP code 57430?

The median household income in ZIP code 57430 is $74,917, below the national median of ~$75,000.

What timezone is ZIP code 57430 in?

ZIP code 57430 observes the CST timezone.