57473 ZIP Code — Seneca, SD

Faulk County, South Dakota

ZIP code 57473 is located in Seneca, South Dakota, within Faulk County. It covers approximately 185.28 square miles and serves a population of 288 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 605.

About ZIP code 57473

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 2000s, giving the area an established character. Median home value is $123,100. Owner-occupancy is high at 95%, well above the national average.

Median household income is $24,286. Poverty affects 52% of residents, above the national average. 42% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with agriculture and mining as the leading industry. Remote work is prevalent — 78% of workers work from home.

College attainment at 9% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 57473 reflects a community defined by a trades-oriented workforce, economic challenges above the national average, high homeownership, a high rate of remote workers, and a significant Social Security-dependent population.

288

population

185.28

sq mi land

Standard

ZIP type

Central (CT)

timezone

57473 ZIP code map

Cities in ZIP code 57473

Below are the cities the US Postal Service accepts for ZIP code 57473. Using any city not on this list may result in mail delivery delays.

City	Status
Seneca	Preferred

Nearby ZIP codes

57438 Faulkton (13.3 mi) 57466 Onaka (14.4 mi) 57475 Tolstoy (15 mi) 57467 Orient (17.2 mi)

Demographics updated 05/2026

Population
Total population	288
Population density	2 / sq mi
State FIPS	46
County FIPS	049

Geography
Land area	185.28 sq mi
Water area	3.35 sq mi
Latitude	45.0279
Longitude	-99.3895
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	64.6%	49.8%	41.7%
$50k – $100k	22.9%	31.7%	33.8%
$100k – $200k	12.5%	18.0%	20.1%
Over $200k	0.0%	0.5%	4.4%

Demographics & statistics

288

Population

People per sq mi

48.8

Median age

$24,286

Median household income

$24,405

Per capita income

$123,100

Median home value

Median monthly rent

94.6%

Home ownership

51.7%

Poverty rate

0.0%

Unemployment

Housing units

8.6%

Bachelor's or higher

Age distribution

Male Female

5–9

10–14

15–19

35–44

45–54

55–59

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	113	39.2%
18 and over	175	60.8%
65 and over	60	20.8%
Median age	48.8 years

Race & ethnicity

White 100%

Group	Count	%
White	288	100%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	64.6%	49.8%	41.7%
$50k – $100k	22.9%	31.7%	33.8%
$100k – $200k	12.5%	18.0%	20.1%
Over $200k	0.0%	0.5%	4.4%

Under $10k 5.4%

$10k–$15k 5.4%

$15k–$25k 50.0%

$25k–$35k 5.4%

$35k–$50k 6.8%

$50k–$75k 5.4%

$100k–$150k 21.6%

Range	% of households
Under $10k	5.4%
$10k–$15k	5.4%
$15k–$25k	50.0%
$25k–$35k	5.4%
$35k–$50k	6.8%
$50k–$75k	5.4%
$100k–$150k	21.6%
Median income	$24,286

Housing

Home values

Under $50k 28.6%

$50k–$100k 4.3%

$100k–$150k 18.6%

$150k–$200k 40.0%

$200k–$300k 8.6%

Housing overview

Metric	Value
Median home value	$123,100
Median rent / month	$0
Owner occupied	94.6%
Renter occupied	5.4%
Vacant	25.3%
Single-family detached	100.0%
Large apartment buildings	0.0%
Mobile homes	0.0%
Median rooms	10.0
Avg household size (owned)	3.66

Year built

Era	%
2020 or later	0.0%
2010–2019	1.0%
2000–2009	44.4%
1990–1999	2.0%
1980–1989	1.0%
1970–1979	0.0%
1960–1969	7.1%
1950–1959	6.1%
1940–1949	0.0%
1939 or earlier	38.4%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	4.0%
2 bedrooms	8.1%
3 bedrooms	32.3%
4 bedrooms	22.2%
5+ bedrooms	33.3%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	18.9%
2 vehicles	18.9%
3 or more	62.2%

Heating fuel

Fuel type	%
Utility gas	2.7%
Electricity	58.1%
Propane / LP gas	28.4%
Fuel oil	5.4%

Households & families

Household type	Count	%
Married-couple family	44	59.5%
Cohabiting couple	3	4.1%
Male householder, no spouse	12	16.2%
Female householder, no spouse	15	20.3%
Households with children under 18	32	43.2%
Households with seniors (65+)	31	41.9%
Average household size	3.89

Marital status

Status	Male	Female
Never married	44.9%	31.3%
Married	51.4%	49.5%
Separated	0.0%	0.0%
Widowed	0.0%	10.1%
Divorced	3.7%	9.1%

Education

Less than 9th grade 8.6%

Some HS, no diploma 0.0%

HS graduate 58.9%

Some college, no degree 3.4%

Associate's degree 20.6%

Bachelor's degree 4.6%

Graduate / professional 4.0%

Metric	%
HS diploma or higher	91.4%
Bachelor's or higher	8.6%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	3	2.7%
Kindergarten	0	0.0%
Elementary school	79	69.9%
High school	31	27.4%
College / grad school	0	0.0%

Employment

Industry of employment

Agriculture & mining 82.5%

Professional & management 5.0%

Construction 3.8%

Retail trade 3.8%

Finance & real estate 3.8%

Transportation & utilities 1.3%

Occupation

Category	%
Management, business & arts	82.5%
Service	0.0%
Sales & office	7.5%
Natural resources & construction	1.3%
Production & transportation	8.8%

Employment type

Type	%
Private sector	21.3%
Government	1.3%
Self-employed	77.5%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	16.3%
Carpool	5.0%
Public transit	0.0%
Walk	1.3%
Work from home	77.5%
Other means	0.0%
Avg commute (minutes)	0.0

Poverty

All people 51.7%

Under 18 years 77.9%

18 and over 34.9%

Married-couple families 63.6%

Female-led households 0.0%

Income support

Source	% of households
Social Security	41.9%
Retirement income	0.0%
Supplemental Security	9.5%
Cash public assistance	0.0%
Food stamps / SNAP	0.0%

Health indicators

Condition	%
Obesity	34.0%
High blood pressure	35.4%
High cholesterol	33.2%
Diabetes	10.5%
Heart disease	8.1%
Stroke	3.6%
Asthma	8.7%
Arthritis	27.9%
Kidney disease	3.4%
Pulmonary disease	6.9%
Cancer	8.9%

Behavior / access	%
Smoking	16.7%
Binge drinking	17.1%
No physical activity	24.2%
Less than 7 hrs sleep	27.8%
Depression	15.1%
Fair or poor health	12.1%
Poor mental health	9.8%
Poor physical health	9.5%
No health insurance	10.9%
Visited doctor (checkup)	77.3%
Visited dentist	68.7%
Cholesterol screening	92.0%
Teeth loss	12.9%

Veterans & disability

Veterans	Count	%
Civilian veterans	8	4.6%

Disability	%
Any disability	4.9%
Under 18	0.0%
18–64 years	5.2%
65 and over	13.3%

Health insurance coverage

Type	%
Private insurance	82.3%
Public insurance	22.2%
No insurance	0.0%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	288	100.0%
Spanish	15	5.2%
Other Indo-European	15	5.2%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	271	94.1%
Born in same state	271	94.1%
Born in different state	264	91.7%
Foreign born	0	0.0%
Naturalized citizen	17	5.9%
Not a US citizen	17	100.0%

Ancestry

Ancestry	Count	%
Italian	167	58%
Dutch	56	19.4%
French	8	2.8%

Ancestry	Count	%
Polish	5	1.7%
English	1	0.3%

Technology access

Metric	% of households
Computer access	25.7%
Internet access	89.2%

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

Frequently asked questions about ZIP code 57473

What city is ZIP code 57473 in?

ZIP code 57473 is primarily assigned to Seneca, South Dakota.

What county is ZIP code 57473 in?

ZIP code 57473 falls within Faulk County, South Dakota.

What is the poverty rate in ZIP code 57473?

52% of residents in ZIP code 57473 live below the poverty line, above the national average.

Is ZIP code 57473 family-oriented?

39% of residents in ZIP code 57473 are under 18, reflecting a younger, family-oriented community.

Is ZIP code 57473 mostly owner-occupied?

95% of occupied units in ZIP code 57473 are owner-occupied, well above the national average.

How educated is the population of ZIP code 57473?

9% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.

What timezone is ZIP code 57473 in?

ZIP code 57473 observes the CST timezone.