57256 ZIP Code — Ortley, SD

Roberts County, South Dakota

ZIP code 57256 is located in Ortley, South Dakota, within Roberts County. It covers approximately 44.37 square miles and serves a population of 223 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 605.

About ZIP code 57256

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Owner-occupancy is high at 92%, well above the national average.

Median household income is $75,515. The poverty rate of 6% is below the national average. 48% 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. The average commute of 21 minutes is near the national average.

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

Health indicators show elevated rates of smoking (22%) compared to national benchmarks.

Overall, ZIP code 57256 reflects a community defined by a trades-oriented workforce, high homeownership, and a significant Social Security-dependent population.

223

population

44.37

sq mi land

Standard

ZIP type

Central (CT)

timezone

57256 ZIP code map

Cities in ZIP code 57256

Below are the cities the US Postal Service accepts for ZIP code 57256. Using any city not on this list may result in mail delivery delays.

City	Status
Ortley	Acceptable

Demographics updated 05/2026

Population
Total population	223
Population density	5 / sq mi
State FIPS	46
County FIPS	109

Geography
Land area	44.37 sq mi
Water area	0.44 sq mi
Latitude	45.2612
Longitude	-97.1649
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	47.9%	50.2%	41.7%
$50k – $100k	46.5%	32.4%	33.8%
$100k – $200k	5.6%	14.7%	20.1%
Over $200k	0.0%	2.7%	4.4%

Demographics & statistics

223

Population

People per sq mi

44.3

Median age

$75,515

Median household income

$32,265

Per capita income

Median home value

Median monthly rent

91.8%

Home ownership

5.8%

Poverty rate

23.8%

Unemployment

Housing units

8.6%

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

← Male

Female →

Age summary

Group	Count	%
Under 18	61	27.4%
18 and over	162	72.6%
65 and over	32	14.3%
Median age	44.3 years

Race & ethnicity

White 96.9%

Two or more races 1.3%

Hispanic or Latino 0.9%

Other race 0.9%

Group	Count	%
White	218	96.9%
Two or more races	3	1.3%
Hispanic or Latino	2	0.9%
Other race	2	0.9%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	47.9%	50.2%	41.7%
$50k – $100k	46.5%	32.4%	33.8%
$100k – $200k	5.6%	14.7%	20.1%
Over $200k	0.0%	2.7%	4.4%

Under $10k 4.7%

$10k–$15k 1.2%

$15k–$25k 1.2%

$25k–$35k 10.6%

$35k–$50k 16.5%

$50k–$75k 11.8%

$75k–$100k 24.7%

$100k–$150k 17.6%

$150k–$200k 3.5%

$200k+ 8.2%

Range	% of households
Under $10k	4.7%
$10k–$15k	1.2%
$15k–$25k	1.2%
$25k–$35k	10.6%
$35k–$50k	16.5%
$50k–$75k	11.8%
$75k–$100k	24.7%
$100k–$150k	17.6%
$150k–$200k	3.5%
$200k+	8.2%
Median income	$75,515

Housing

Home values

Under $50k 30.8%

$50k–$100k 11.5%

$100k–$150k 2.6%

$150k–$200k 3.8%

$200k–$300k 5.1%

$300k–$500k 39.7%

$500k–$1M 1.3%

$1M+ 5.1%

Housing overview

Metric	Value
Median home value	$0
Median rent / month	$0
Owner occupied	91.8%
Renter occupied	8.2%
Vacant	15.8%
Single-family detached	98.0%
Large apartment buildings	0.0%
Mobile homes	2.0%
Median rooms	6.3
Avg household size (owned)	2.72

Year built

Era	%
2020 or later	0.0%
2010–2019	7.9%
2000–2009	14.9%
1990–1999	2.0%
1980–1989	1.0%
1970–1979	5.0%
1960–1969	16.8%
1950–1959	9.9%
1940–1949	5.9%
1939 or earlier	36.6%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	5.0%
2 bedrooms	38.6%
3 bedrooms	34.7%
4 bedrooms	5.9%
5+ bedrooms	15.8%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	9.4%
2 vehicles	40.0%
3 or more	50.6%

Heating fuel

Fuel type	%
Utility gas	1.2%
Electricity	24.7%
Propane / LP gas	63.5%
Fuel oil	10.6%

Households & families

Household type	Count	%
Married-couple family	34	40.0%
Cohabiting couple	17	20.0%
Male householder, no spouse	30	35.3%
Female householder, no spouse	4	4.7%
Households with children under 18	24	28.2%
Households with seniors (65+)	23	27.1%
Average household size	2.62

Marital status

Status	Male	Female
Never married	54.7%	14.5%
Married	31.1%	55.1%
Separated	0.0%	0.0%
Widowed	7.5%	5.8%
Divorced	6.6%	24.6%

Education

Less than 9th grade 4.6%

Some HS, no diploma 22.5%

HS graduate 38.4%

Some college, no degree 14.6%

Associate's degree 11.3%

Bachelor's degree 6.6%

Graduate / professional 2.0%

Metric	%
HS diploma or higher	72.8%
Bachelor's or higher	8.6%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	2	3.4%
Elementary school	40	67.8%
High school	13	22.0%
College / grad school	4	6.8%

Employment

Industry of employment

Agriculture & mining 28.0%

Retail trade 23.7%

Education & healthcare 22.6%

Manufacturing 12.9%

Wholesale trade 9.7%

Transportation & utilities 2.2%

Arts, food & hospitality 1.1%

Occupation

Category	%
Management, business & arts	43.0%
Service	3.2%
Sales & office	6.5%
Natural resources & construction	16.1%
Production & transportation	31.2%

Employment type

Type	%
Private sector	81.7%
Government	5.4%
Self-employed	12.9%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	68.9%
Carpool	15.6%
Public transit	0.0%
Walk	3.3%
Work from home	12.2%
Other means	0.0%
Avg commute (minutes)	21.0

Poverty

All people 5.8%

Under 18 years 6.6%

18 and over 5.6%

Married-couple families 2.9%

Female-led households 0.0%

Income support

Source	% of households
Social Security	48.2%
Retirement income	11.8%
Supplemental Security	4.7%
Cash public assistance	1.2%
Food stamps / SNAP	4.7%

Health indicators

Condition	%
Obesity	38.0%
High blood pressure	38.7%
High cholesterol	33.8%
Diabetes	13.0%
Heart disease	10.1%
Stroke	4.6%
Asthma	9.3%
Arthritis	29.8%
Kidney disease	4.1%
Pulmonary disease	9.4%
Cancer	8.6%

Behavior / access	%
Smoking	22.2%
Binge drinking	17.9%
No physical activity	30.0%
Less than 7 hrs sleep	28.6%
Depression	15.8%
Fair or poor health	16.6%
Poor mental health	11.1%
Poor physical health	11.8%
No health insurance	14.8%
Visited doctor (checkup)	77.0%
Visited dentist	62.0%
Cholesterol screening	88.0%
Teeth loss	19.2%

Veterans & disability

Veterans	Count	%
Civilian veterans	12	7.4%

Disability	%
Any disability	6.7%
Under 18	0.0%
18–64 years	6.2%
65 and over	21.9%

Health insurance coverage

Type	%
Private insurance	52.0%
Public insurance	48.9%
No insurance	6.7%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	220	98.7%
Spanish	1	0.5%
Other Indo-European	1	0.5%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	222	99.6%
Born in same state	222	99.6%
Born in different state	185	83.0%
Foreign born	0	0.0%
Naturalized citizen	1	0.4%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
Polish	62	27.8%
Italian	20	9%

Ancestry	Count	%
Arab	5	2.2%
French	4	1.8%

Technology access

Metric	% of households
Computer access	38.1%
Internet access	89.4%

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

Frequently asked questions about ZIP code 57256

What city is ZIP code 57256 in?

ZIP code 57256 is primarily assigned to Ortley, South Dakota.

What county is ZIP code 57256 in?

ZIP code 57256 falls within Roberts County, South Dakota.

Is ZIP code 57256 mostly owner-occupied?

92% of occupied units in ZIP code 57256 are owner-occupied, well above the national average.

How educated is the population of ZIP code 57256?

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

Does ZIP code 57256 have a large retiree population?

48% of households in ZIP code 57256 receive Social Security income, suggesting a significant retiree or disability population.

What is the population of ZIP code 57256?

ZIP code 57256 has an estimated population of 223 residents, with a density of 5 people per square mile.

What timezone is ZIP code 57256 in?

ZIP code 57256 observes the CST timezone.