57451 ZIP Code — Ipswich, SD

Edmunds County, South Dakota

ZIP code 57451 is located in Ipswich, South Dakota, within Edmunds County. It covers approximately 430.24 square miles and serves a population of 2,543 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 605.

About ZIP code 57451

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1970s, giving the area an established character. Median home value is $210,300. Owner-occupancy is high at 82%, well above the national average.

Median household income is $85,238. The poverty rate of 6% is below the national average. 34% 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 22 minutes is near the national average.

Educational attainment is near the national average, with 32% of residents holding a bachelor's degree or higher.

Overall, ZIP code 57451 reflects a community defined by high homeownership and a significant Social Security-dependent population.

2,543

population

430.24

sq mi land

Standard

ZIP type

Central (CT)

timezone

57451 ZIP code map

Cities in ZIP code 57451

Below are the cities the US Postal Service accepts for ZIP code 57451. Using any city not on this list may result in mail delivery delays.

City	Status
Ipswich	Acceptable
Ipswich	Preferred

Nearby ZIP codes

57460 Mansfield (14.9 mi) 57435 Cresbard (16.4 mi) 57401 Aberdeen (17.3 mi) 57481 Westport (18.9 mi)

Demographics updated 05/2026

Population
Total population	2,543
Population density	6 / sq mi
State FIPS	46
County FIPS	045

Geography
Land area	430.24 sq mi
Water area	2.80 sq mi
Latitude	45.4190
Longitude	-98.8769
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	33.7%	40.0%	41.7%
$50k – $100k	37.7%	34.0%	33.8%
$100k – $200k	23.2%	21.2%	20.1%
Over $200k	5.5%	4.8%	4.4%

Demographics & statistics

2,543

Population

People per sq mi

40.1

Median age

$85,238

Median household income

$39,660

Per capita income

$210,300

Median home value

$1,014

Median monthly rent

82.4%

Home ownership

5.5%

Poverty rate

3.2%

Unemployment

883

Housing units

31.9%

Bachelor's or higher

Age distribution

Male Female

111

Under 5

113

124

5–9

127

10–14

15–19

20–24

156

25–34

159

148

35–44

150

119

45–54

122

110

55–59

113

101

60–64

103

163

65–74

166

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	628	24.7%
18 and over	1,915	75.3%
65 and over	477	18.8%
Median age	40.1 years

Race & ethnicity

White 96.1%

American Indian / Alaska Native 2.1%

Two or more races 0.9%

Hispanic or Latino 0.7%

Asian 0.1%

Black or African American 0.1%

Group	Count	%
White	2,461	96.1%
American Indian / Alaska Native	55	2.1%
Two or more races	22	0.9%
Hispanic or Latino	19	0.7%
Asian	3	0.1%
Black or African American	2	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	33.7%	40.0%	41.7%
$50k – $100k	37.7%	34.0%	33.8%
$100k – $200k	23.2%	21.2%	20.1%
Over $200k	5.5%	4.8%	4.4%

Under $10k 4.2%

$10k–$15k 0.8%

$15k–$25k 6.6%

$25k–$35k 6.0%

$35k–$50k 7.7%

$50k–$75k 18.2%

$75k–$100k 20.6%

$100k–$150k 16.7%

$150k–$200k 12.1%

$200k+ 7.2%

Range	% of households
Under $10k	4.2%
$10k–$15k	0.8%
$15k–$25k	6.6%
$25k–$35k	6.0%
$35k–$50k	7.7%
$50k–$75k	18.2%
$75k–$100k	20.6%
$100k–$150k	16.7%
$150k–$200k	12.1%
$200k+	7.2%
Median income	$85,238

Housing

Home values

Under $50k 12.5%

$50k–$100k 3.8%

$100k–$150k 15.1%

$150k–$200k 17.0%

$200k–$300k 17.0%

$300k–$500k 17.7%

$500k–$1M 17.0%

Housing overview

Metric	Value
Median home value	$210,300
Median rent / month	$1,014
Owner occupied	82.4%
Renter occupied	17.6%
Vacant	13.5%
Single-family detached	86.9%
Large apartment buildings	0.0%
Mobile homes	10.1%
Median rooms	7.1
Avg household size (owned)	2.83

Year built

Era	%
2020 or later	0.0%
2010–2019	7.0%
2000–2009	7.9%
1990–1999	11.8%
1980–1989	11.3%
1970–1979	19.6%
1960–1969	8.0%
1950–1959	9.8%
1940–1949	5.2%
1939 or earlier	19.4%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	1.5%
2 bedrooms	15.3%
3 bedrooms	43.1%
4 bedrooms	27.1%
5+ bedrooms	13.0%

Vehicles per household

Vehicles	% of households
No vehicle	0.7%
1 vehicle	12.9%
2 vehicles	41.0%
3 or more	45.4%

Heating fuel

Fuel type	%
Utility gas	33.1%
Electricity	38.3%
Propane / LP gas	23.7%
No fuel used	0.3%

Households & families

Household type	Count	%
Married-couple family	610	67.8%
Cohabiting couple	51	5.7%
Male householder, no spouse	110	12.2%
Female householder, no spouse	129	14.3%
Households with children under 18	238	26.4%
Households with seniors (65+)	285	31.7%
Average household size	2.75

Marital status

Status	Male	Female
Never married	20.1%	20.8%
Married	71.4%	59.3%
Separated	0.0%	1.1%
Widowed	3.2%	11.1%
Divorced	5.4%	7.8%

Education

Less than 9th grade 4.9%

Some HS, no diploma 3.4%

HS graduate 27.6%

Some college, no degree 17.6%

Associate's degree 14.7%

Bachelor's degree 25.1%

Graduate / professional 6.7%

Metric	%
HS diploma or higher	91.7%
Bachelor's or higher	31.9%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	41	7.5%
Kindergarten	53	9.7%
Elementary school	270	49.2%
High school	83	15.1%
College / grad school	102	18.6%

Employment

Industry of employment

Education & healthcare 24.8%

Agriculture & mining 19.1%

Arts, food & hospitality 11.3%

Retail trade 8.9%

Other services 6.9%

Transportation & utilities 6.0%

Construction 5.0%

Finance & real estate 4.4%

Professional & management 3.6%

Wholesale trade 3.3%

Public administration 3.0%

Manufacturing 2.2%

Information 1.4%

Occupation

Category	%
Management, business & arts	44.8%
Service	21.0%
Sales & office	13.3%
Natural resources & construction	11.8%
Production & transportation	9.2%

Employment type

Type	%
Private sector	63.7%
Government	15.6%
Self-employed	20.7%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	76.5%
Carpool	2.8%
Public transit	0.0%
Walk	4.2%
Work from home	11.8%
Other means	4.7%
Avg commute (minutes)	22.3

Poverty

All people 5.5%

Under 18 years 7.8%

18 and over 4.7%

Married-couple families 2.5%

Female-led households 0.0%

Income support

Source	% of households
Social Security	33.8%
Retirement income	18.4%
Supplemental Security	4.3%
Cash public assistance	1.3%
Food stamps / SNAP	2.2%

Health indicators

Condition	%
Obesity	32.0%
High blood pressure	31.1%
High cholesterol	31.9%
Diabetes	8.8%
Heart disease	6.9%
Stroke	3.0%
Asthma	8.4%
Arthritis	24.3%
Kidney disease	2.9%
Pulmonary disease	5.6%
Cancer	8.0%

Behavior / access	%
Smoking	15.8%
Binge drinking	20.1%
No physical activity	21.8%
Less than 7 hrs sleep	29.1%
Depression	14.5%
Fair or poor health	10.1%
Poor mental health	9.7%
Poor physical health	8.2%
No health insurance	10.5%
Visited doctor (checkup)	76.7%
Visited dentist	73.6%
Cholesterol screening	90.7%
Teeth loss	11.2%

Veterans & disability

Veterans	Count	%
Civilian veterans	135	7.0%

Disability	%
Any disability	14.0%
Under 18	0.5%
18–64 years	13.7%
65 and over	34.9%

Health insurance coverage

Type	%
Private insurance	78.4%
Public insurance	27.0%
No insurance	5.0%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	2,319	91.2%
Spanish	26	1.1%
Other Indo-European	25	1.1%
Asian & Pacific Islander	0	0.0%
Other languages	1	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	2,515	98.9%
Born in same state	2,511	98.7%
Born in different state	1,933	76.0%
Foreign born	4	0.2%
Naturalized citizen	28	1.1%
Not a US citizen	14	50.0%

Ancestry

Ancestry	Count	%
Italian	268	10.5%
Polish	257	10.1%
French	169	6.6%
Arab	40	1.6%

Ancestry	Count	%
English	20	0.8%
Dutch	20	0.8%
German	11	0.4%

Technology access

Metric	% of households
Computer access	35.4%
Internet access	97.1%

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

Frequently asked questions about ZIP code 57451

What city is ZIP code 57451 in?

ZIP code 57451 is primarily assigned to Ipswich, South Dakota.

What county is ZIP code 57451 in?

ZIP code 57451 falls within Edmunds County, South Dakota.

Is ZIP code 57451 mostly owner-occupied?

82% of occupied units in ZIP code 57451 are owner-occupied, well above the national average.

What is the population of ZIP code 57451?

ZIP code 57451 has an estimated population of 2,543 residents, with a density of 6 people per square mile.

What is the typical home value in ZIP code 57451?

The median home value in ZIP code 57451 is $210,300.

What is the median household income in ZIP code 57451?

The median household income in ZIP code 57451 is $85,238, above the national median of ~$75,000.

What timezone is ZIP code 57451 in?

ZIP code 57451 observes the CST timezone.