57353 ZIP Code — Iroquois, SD

Kingsbury County, South Dakota

ZIP code 57353 is located in Iroquois, South Dakota, within Kingsbury County. It covers approximately 298.87 square miles and serves a population of 806 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 605.

About ZIP code 57353

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 $169,500. Owner-occupancy is high at 90%, well above the national average.

The gap between median ($69,141) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 3% is below the national average.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 19 minutes is near the national average.

Educational attainment is near the national average, with 26% of residents holding a bachelor's degree or higher.

806

population

298.87

sq mi land

Standard

ZIP type

Central (CT)

timezone

57353 ZIP code map

Cities in ZIP code 57353

Below are the cities the US Postal Service accepts for ZIP code 57353. Using any city not on this list may result in mail delivery delays.

City	Status
Iroquois	Acceptable
Iroquois	Preferred

Nearby ZIP codes

57324 Cavour (10.6 mi) 57231 De Smet (13.4 mi) 57350 Huron (16.9 mi) 57322 Carpenter (18.4 mi) 57278 Willow Lake (18.7 mi) 57399 Huron (18.8 mi) 57323 Carthage (19 mi)

Demographics updated 05/2026

Population
Total population	806
Population density	3 / sq mi
State FIPS	46
County FIPS	077

Geography
Land area	298.87 sq mi
Water area	0.21 sq mi
Latitude	44.3695
Longitude	-97.8335
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	35.8%	37.0%	41.7%
$50k – $100k	39.0%	37.7%	33.8%
$100k – $200k	20.8%	21.3%	20.1%
Over $200k	4.4%	4.0%	4.4%

Demographics & statistics

806

Population

People per sq mi

40.1

Median age

$69,141

Median household income

$43,009

Per capita income

$169,500

Median home value

$575

Median monthly rent

90.0%

Home ownership

3.1%

Poverty rate

1.7%

Unemployment

352

Housing units

25.6%

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	228	28.3%
18 and over	578	71.7%
65 and over	127	15.8%
Median age	40.1 years

Race & ethnicity

White 92.1%

American Indian / Alaska Native 5.7%

Two or more races 1.1%

Hispanic or Latino 0.9%

Asian 0.2%

Group	Count	%
White	749	92.1%
American Indian / Alaska Native	46	5.7%
Two or more races	9	1.1%
Hispanic or Latino	7	0.9%
Asian	2	0.2%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	35.8%	37.0%	41.7%
$50k – $100k	39.0%	37.7%	33.8%
$100k – $200k	20.8%	21.3%	20.1%
Over $200k	4.4%	4.0%	4.4%

Under $10k 2.3%

$10k–$15k 1.3%

$15k–$25k 8.3%

$25k–$35k 6.3%

$35k–$50k 8.3%

$50k–$75k 30.2%

$75k–$100k 15.0%

$100k–$150k 16.3%

$150k–$200k 5.3%

$200k+ 6.6%

Range	% of households
Under $10k	2.3%
$10k–$15k	1.3%
$15k–$25k	8.3%
$25k–$35k	6.3%
$35k–$50k	8.3%
$50k–$75k	30.2%
$75k–$100k	15.0%
$100k–$150k	16.3%
$150k–$200k	5.3%
$200k+	6.6%
Median income	$69,141

Housing

Home values

Under $50k 17.0%

$50k–$100k 11.1%

$100k–$150k 14.8%

$150k–$200k 10.3%

$200k–$300k 22.5%

$300k–$500k 18.8%

$500k–$1M 5.5%

Housing overview

Metric	Value
Median home value	$169,500
Median rent / month	$575
Owner occupied	90.0%
Renter occupied	10.0%
Vacant	21.2%
Single-family detached	86.6%
Large apartment buildings	0.0%
Mobile homes	6.3%
Median rooms	7.1
Avg household size (owned)	2.56

Year built

Era	%
2020 or later	0.0%
2010–2019	16.2%
2000–2009	16.8%
1990–1999	10.7%
1980–1989	4.2%
1970–1979	14.4%
1960–1969	3.9%
1950–1959	3.1%
1940–1949	3.1%
1939 or earlier	27.5%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	5.8%
2 bedrooms	17.3%
3 bedrooms	29.8%
4 bedrooms	30.1%
5+ bedrooms	17.0%

Vehicles per household

Vehicles	% of households
No vehicle	2.7%
1 vehicle	15.0%
2 vehicles	36.2%
3 or more	46.2%

Heating fuel

Fuel type	%
Electricity	40.5%
Propane / LP gas	51.5%
Wood	0.3%
No fuel used	3.3%

Households & families

Household type	Count	%
Married-couple family	187	62.1%
Cohabiting couple	12	4.0%
Male householder, no spouse	64	21.3%
Female householder, no spouse	38	12.6%
Households with children under 18	93	30.9%
Households with seniors (65+)	74	24.6%
Average household size	2.66

Marital status

Status	Male	Female
Never married	30.4%	15.1%
Married	60.7%	64.0%
Separated	0.6%	1.0%
Widowed	0.9%	5.8%
Divorced	7.4%	14.0%

Education

Less than 9th grade 7.9%

Some HS, no diploma 3.8%

HS graduate 30.5%

Some college, no degree 15.8%

Associate's degree 16.4%

Bachelor's degree 20.7%

Graduate / professional 4.9%

Metric	%
HS diploma or higher	88.3%
Bachelor's or higher	25.6%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	10	5.0%
Kindergarten	10	5.0%
Elementary school	107	53.0%
High school	54	26.7%
College / grad school	21	10.4%

Employment

Industry of employment

Education & healthcare 23.6%

Agriculture & mining 18.0%

Manufacturing 14.2%

Construction 9.4%

Retail trade 9.4%

Transportation & utilities 7.2%

Finance & real estate 6.7%

Arts, food & hospitality 4.3%

Professional & management 2.6%

Wholesale trade 1.9%

Other services 1.4%

Public administration 1.2%

Occupation

Category	%
Management, business & arts	39.7%
Service	8.9%
Sales & office	21.6%
Natural resources & construction	14.2%
Production & transportation	15.6%

Employment type

Type	%
Private sector	67.8%
Government	13.9%
Self-employed	18.3%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	71.9%
Carpool	8.1%
Public transit	0.2%
Walk	11.0%
Work from home	8.8%
Other means	0.0%
Avg commute (minutes)	18.7

Poverty

All people 3.1%

Under 18 years 0.0%

18 and over 4.3%

Married-couple families 2.1%

Female-led households 0.0%

Income support

Source	% of households
Social Security	25.9%
Retirement income	19.9%
Supplemental Security	2.7%
Cash public assistance	1.0%
Food stamps / SNAP	3.7%

Health indicators

Condition	%
Obesity	33.5%
High blood pressure	30.9%
High cholesterol	31.6%
Diabetes	9.0%
Heart disease	6.9%
Stroke	3.1%
Asthma	8.7%
Arthritis	24.0%
Kidney disease	2.9%
Pulmonary disease	6.0%
Cancer	7.5%

Behavior / access	%
Smoking	17.2%
Binge drinking	19.8%
No physical activity	22.8%
Less than 7 hrs sleep	27.5%
Depression	15.2%
Fair or poor health	11.2%
Poor mental health	10.5%
Poor physical health	8.7%
No health insurance	12.5%
Visited doctor (checkup)	74.5%
Visited dentist	68.1%
Cholesterol screening	88.6%
Teeth loss	13.9%

Veterans & disability

Veterans	Count	%
Civilian veterans	42	7.3%

Disability	%
Any disability	14.3%
Under 18	3.5%
18–64 years	14.4%
65 and over	33.1%

Health insurance coverage

Type	%
Private insurance	80.6%
Public insurance	29.0%
No insurance	4.7%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	752	93.3%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	804	99.8%
Born in same state	804	99.8%
Born in different state	639	79.3%
Foreign born	0	0.0%
Naturalized citizen	2	0.2%
Not a US citizen	2	100.0%

Ancestry

Ancestry	Count	%
Italian	88	10.9%
Polish	68	8.4%
French	61	7.6%
Arab	32	4%

Ancestry	Count	%
English	8	1%
Dutch	8	1%
German	3	0.4%

Technology access

Metric	% of households
Computer access	37.3%
Internet access	90.4%

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

Frequently asked questions about ZIP code 57353

What city is ZIP code 57353 in?

ZIP code 57353 is primarily assigned to Iroquois, South Dakota.

What county is ZIP code 57353 in?

ZIP code 57353 falls within Kingsbury County, South Dakota.

Is ZIP code 57353 mostly owner-occupied?

90% of occupied units in ZIP code 57353 are owner-occupied, well above the national average.

What is the typical home value in ZIP code 57353?

The median home value in ZIP code 57353 is $169,500.

What is the population of ZIP code 57353?

ZIP code 57353 has an estimated population of 806 residents, with a density of 3 people per square mile.

What is the median household income in ZIP code 57353?

The median household income in ZIP code 57353 is $69,141, below the national median of ~$75,000.

What timezone is ZIP code 57353 in?

ZIP code 57353 observes the CST timezone.