57520 ZIP Code — Agar, SD

Sully County, South Dakota

ZIP code 57520 is located in Agar, South Dakota, within Sully County. It covers approximately 157.43 square miles and serves a population of 145 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 605.

145
population
157.43
sq mi land
Standard
ZIP type
Central (CT)
timezone
57520 ZIP code map
Cities in ZIP code 57520

Below are the cities the US Postal Service accepts for ZIP code 57520. Using any city not on this list may result in mail delivery delays.

City Status
Agar Preferred
Nearby ZIP codes
57564 Onida (11 mi) 57442 Gettysburg (15 mi) 57501 Pierre (19.6 mi)
Demographics updated 05/2026
Population
Total population 145
Population density 1 / sq mi
State FIPS 46
County FIPS 119
Geography
Land area 157.43 sq mi
Water area 0.26 sq mi
Latitude 44.8464
Longitude -100.2005
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 73.1% 45.4% 41.7%
$50k – $100k 26.9% 33.2% 33.8%
$100k – $200k 0.0% 17.9% 20.1%
Over $200k 0.0% 3.6% 4.4%

Demographics & statistics

145
Population
1
People per sq mi
62.3
Median age
$52,083
Median household income
$37,479
Per capita income
$107,000
Median home value
$775
Median monthly rent
77.5%
Home ownership
13.1%
Poverty rate
0.0%
Unemployment
117
Housing units
33.6%
Bachelor's or higher

Age distribution

Male Female
4
10–14
4
16
25–34
17
6
35–44
7
1
45–54
2
6
55–59
7
5
60–64
6
21
65–74
22
5
75–84
5
5
85+
6
← Male
Female →

Age summary

GroupCount%
Under 1885.5%
18 and over13794.5%
65 and over6444.1%
Median age62.3 years

Race & ethnicity

White 92.4%
Two or more races 7.6%
GroupCount%
White13492.4%
Two or more races117.6%

Household income

Income range This ZIP County avg State avg
Under $50k 73.1% 45.4% 41.7%
$50k – $100k 26.9% 33.2% 33.8%
$100k – $200k 0.0% 17.9% 20.1%
Over $200k 0.0% 3.6% 4.4%
Under $10k 13.5%
$10k–$15k 4.5%
$15k–$25k 19.1%
$35k–$50k 10.1%
$50k–$75k 34.8%
$75k–$100k 7.9%
$100k–$150k 4.5%
$150k–$200k 4.5%
$200k+ 1.1%
Range% of households
Under $10k13.5%
$10k–$15k4.5%
$15k–$25k19.1%
$35k–$50k10.1%
$50k–$75k34.8%
$75k–$100k7.9%
$100k–$150k4.5%
$150k–$200k4.5%
$200k+1.1%
Median income$52,083

Housing

Home values

Under $50k 36.2%
$50k–$100k 7.2%
$100k–$150k 29.0%
$150k–$200k 8.7%
$200k–$300k 7.2%
$300k–$500k 11.6%

Housing overview

MetricValue
Median home value$107,000
Median rent / month$775
Owner occupied77.5%
Renter occupied22.5%
Vacant35.0%
Single-family detached79.6%
Large apartment buildings0.0%
Mobile homes19.0%
Median rooms5.6
Avg household size (owned)1.58

Year built

Era%
2020 or later0.0%
2010–201913.1%
2000–20092.2%
1990–19993.6%
1980–19895.8%
1970–19795.1%
1960–19692.9%
1950–19595.8%
1940–19495.8%
1939 or earlier55.5%

Bedrooms

Size% of units
No bedroom (studio)0.0%
1 bedroom6.6%
2 bedrooms12.4%
3 bedrooms73.7%
4 bedrooms4.4%
5+ bedrooms2.9%

Vehicles per household

Vehicles% of households
No vehicle2.2%
1 vehicle36.0%
2 vehicles30.3%
3 or more31.5%

Heating fuel

Fuel type%
Utility gas57.3%
Electricity33.7%
Propane / LP gas6.7%
No fuel used2.2%

Households & families

Household typeCount%
Married-couple family3438.2%
Cohabiting couple00.0%
Male householder, no spouse2528.1%
Female householder, no spouse3033.7%
Households with children under 1833.4%
Households with seniors (65+)5056.2%
Average household size1.63

Marital status

StatusMaleFemale
Never married31.7%2.7%
Married46.0%47.3%
Separated0.0%0.0%
Widowed11.1%32.4%
Divorced11.1%17.6%

Education

Less than 9th grade 0.0%
Some HS, no diploma 0.0%
HS graduate 24.1%
Some college, no degree 18.2%
Associate's degree 24.1%
Bachelor's degree 33.6%
Graduate / professional 0.0%
Metric%
HS diploma or higher100.0%
Bachelor's or higher33.6%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool00.0%
Kindergarten00.0%
Elementary school8100.0%
High school00.0%
College / grad school00.0%

Employment

Industry of employment

Agriculture & mining 26.7%
Education & healthcare 21.3%
Arts, food & hospitality 21.3%
Construction 14.7%
Retail trade 6.7%
Manufacturing 5.3%
Wholesale trade 1.3%
Finance & real estate 1.3%
Other services 1.3%

Occupation

Category%
Management, business & arts62.7%
Service4.0%
Sales & office13.3%
Natural resources & construction8.0%
Production & transportation12.0%

Employment type

Type%
Private sector88.0%
Government2.7%
Self-employed9.3%
Unpaid family workers0.0%

Commute

Method%
Drive alone93.3%
Carpool4.0%
Public transit0.0%
Walk2.7%
Work from home0.0%
Other means0.0%
Avg commute (minutes)17.9

Poverty

All people 13.1%
Under 18 years 0.0%
18 and over 13.9%
Married-couple families 11.8%
Female-led households 0.0%

Income support

Source% of households
Social Security44.9%
Retirement income10.1%
Supplemental Security1.1%
Cash public assistance14.6%
Food stamps / SNAP14.6%

Health indicators

Condition%
Obesity32.6%
High blood pressure36.9%
High cholesterol35.3%
Diabetes11.1%
Heart disease8.8%
Stroke3.9%
Asthma8.6%
Arthritis29.6%
Kidney disease3.7%
Pulmonary disease7.0%
Cancer9.8%
Behavior / access%
Smoking14.9%
Binge drinking17.0%
No physical activity23.8%
Less than 7 hrs sleep26.5%
Depression14.2%
Fair or poor health12.1%
Poor mental health9.5%
Poor physical health9.6%
No health insurance10.1%
Visited doctor (checkup)78.8%
Visited dentist70.7%
Cholesterol screening91.7%
Teeth loss12.2%

Veterans & disability

VeteransCount%
Civilian veterans1410.2%
Disability%
Any disability21.4%
Under 180.0%
18–64 years16.4%
65 and over29.7%

Health insurance coverage

Type%
Private insurance73.1%
Public insurance46.2%
No insurance4.8%
Uninsured under 190.0%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only145100.0%
Spanish00.0%
Other Indo-European00.0%
Asian & Pacific Islander00.0%
Other languages00.0%

Place of birth & citizenship

OriginCount%
Native born (US)145100.0%
Born in same state145100.0%
Born in different state11176.6%
Foreign born00.0%
Naturalized citizen00.0%
Not a US citizen00.0%

Ancestry

AncestryCount%
French2315.9%
Dutch128.3%
AncestryCount%
Arab85.5%
Polish53.4%

Technology access

Metric% of households
Computer access61.4%
Internet access95.5%

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

Frequently asked questions about ZIP code 57520

What city is ZIP code 57520 in?

ZIP code 57520 is primarily assigned to Agar, South Dakota.

What county is ZIP code 57520 in?

ZIP code 57520 falls within Sully County, South Dakota.

Does ZIP code 57520 have an older population?

44% of residents in ZIP code 57520 are 65 or older, above the national average of ~17%.

Does ZIP code 57520 have a large retiree population?

45% of households in ZIP code 57520 receive Social Security income, suggesting a significant retiree or disability population.

What is the typical home value in ZIP code 57520?

The median home value in ZIP code 57520 is $107,000.

Does ZIP code 57520 have a large veteran population?

10% of civilians in ZIP code 57520 are veterans, above the national average of ~7%.

What timezone is ZIP code 57520 in?

ZIP code 57520 observes the CST timezone.

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