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South Dakota ZIP Codes
Day County
Roslyn, SD
57261
57261 ZIP Code — Roslyn, SD
Day County, South Dakota
ZIP code 57261 is located in
Roslyn ,
South Dakota ,
within Day County .
It covers approximately 67.50 square miles and serves a population of
296 residents.
This is a standard ZIP code in the Central (CT) timezone,
served by area code 605 .
About ZIP code 57261
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 $101,800. Owner-occupancy sits near the national average at 73%.
The gap between median ($63,438) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 2% is below the national average. 50% of households receive Social Security income, suggesting a notable retiree or disability population.
The dominant occupation class is production, transportation, and material moving, with retail trade as the leading industry. The average commute of 25 minutes is near the national average.
College attainment at 17% is below the national average, consistent with a trades and production-oriented local economy.
Overall, ZIP code 57261 reflects a community defined by a trades-oriented workforce and a significant Social Security-dependent population.
57261 ZIP code map
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Cities in ZIP code 57261
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Nearby ZIP codes
Demographics
updated 05/2026
Population
Total population
296
Population density
4 / sq mi
State FIPS
46
County FIPS
037
Geography
Land area
67.50 sq mi
Water area
8.83 sq mi
Latitude
45.5368
Longitude
-97.5808
Timezone
Central (CT)
Area code
605
Economics
updated 05/2026
Household income
Income range
This ZIP
County avg
State avg
Under $50k
54.3%
52.5%
41.7%
$50k – $100k
27.9%
30.0%
33.8%
$100k – $200k
8.6%
16.0%
20.1%
Over $200k
9.3%
1.5%
4.4%
Demographics & statistics
$63,438
Median household income
$101,800
Median home value
16.6%
Bachelor's or higher
Age distribution
Age summary
Group Count % Under 18 50 16.9% 18 and over 246 83.1% 65 and over 140 47.3% Median age 61.0 years
Race & ethnicity
American Indian / Alaska Native
5.4%
Group Count % White 265 89.5% American Indian / Alaska Native 16 5.4% Two or more races 15 5.1%
Household income
Income range
This ZIP
County avg
State avg
Under $50k
54.3%
52.5%
41.7%
$50k – $100k
27.9%
30.0%
33.8%
$100k – $200k
8.6%
16.0%
20.1%
Over $200k
9.3%
1.5%
4.4%
Range % of households $10k–$15k 0.8% $15k–$25k 16.0% $25k–$35k 11.8% $35k–$50k 20.2% $50k–$75k 7.6% $75k–$100k 14.3% $100k–$150k 24.4% $200k+ 5.0% Median income $63,438
Housing
Housing overview
Metric Value Median home value $101,800 Median rent / month $433 Owner occupied 73.1% Renter occupied 26.9% Vacant 17.9% Single-family detached 86.2% Large apartment buildings 0.0% Mobile homes 5.5% Median rooms 5.4 Avg household size (owned) 2.10
Year built
Era % 2020 or later 0.0% 2010–2019 0.0% 2000–2009 2.1% 1990–1999 0.0% 1980–1989 4.1% 1970–1979 22.1% 1960–1969 17.2% 1950–1959 2.1% 1940–1949 21.4% 1939 or earlier 31.0%
Bedrooms
Size % of units No bedroom (studio) 0.0% 1 bedroom 9.0% 2 bedrooms 42.8% 3 bedrooms 18.6% 4 bedrooms 29.0% 5+ bedrooms 0.7%
Vehicles per household
Vehicles % of households No vehicle 0.0% 1 vehicle 16.0% 2 vehicles 27.7% 3 or more 56.3%
Heating fuel
Fuel type % Utility gas 1.7% Electricity 14.3% Propane / LP gas 55.5% Fuel oil 15.1% Wood 13.4%
Households & families
Household type Count % Married-couple family 79 66.4% Cohabiting couple 0 0.0% Male householder, no spouse 22 18.5% Female householder, no spouse 18 15.1% Households with children under 18 24 20.2% Households with seniors (65+) 62 52.1% Average household size 2.16
Marital status
Status Male Female Never married 14.8% 12.5% Married 68.7% 56.6% Separated 0.0% 0.0% Widowed 7.0% 18.4% Divorced 9.6% 12.5%
Education
Some HS, no diploma
10.0%
Some college, no degree
10.8%
Graduate / professional
3.7%
Metric % HS diploma or higher 85.5% Bachelor's or higher 16.6%
School enrollment (ages 3–17)
Type Count % Nursery / preschool 5 11.6% Kindergarten 1 2.3% Elementary school 24 55.8% High school 10 23.3% College / grad school 3 7.0%
Employment
Industry of employment
Education & healthcare
16.5%
Finance & real estate
15.6%
Agriculture & mining
5.5%
Professional & management
4.6%
Transportation & utilities
3.7%
Occupation
Category % Management, business & arts 15.6% Service 14.7% Sales & office 16.5% Natural resources & construction 14.7% Production & transportation 38.5%
Employment type
Type % Private sector 82.6% Government 4.6% Self-employed 11.0% Unpaid family workers 1.8%
Commute
Method % Drive alone 73.4% Carpool 10.1% Public transit 0.0% Walk 4.6% Work from home 11.9% Other means 0.0% Avg commute (minutes) 25.1
Poverty
Married-couple families
0.0%
Female-led households
18.2%
Income support
Source % of households Social Security 50.4% Retirement income 17.6% Supplemental Security 5.0% Cash public assistance 0.0% Food stamps / SNAP 3.4%
Health indicators
Condition % Obesity 34.8% High blood pressure 41.0% High cholesterol 37.2% Diabetes 12.5% Heart disease 10.7% Stroke 4.8% Asthma 8.7% Arthritis 33.1% Kidney disease 4.3% Pulmonary disease 8.5% Cancer 10.6%
Behavior / access % Smoking 17.2% Binge drinking 14.4% No physical activity 28.0% Less than 7 hrs sleep 27.0% Depression 14.4% Fair or poor health 14.6% Poor mental health 9.4% Poor physical health 11.0% No health insurance 11.6% Visited doctor (checkup) 79.2% Visited dentist 65.0% Cholesterol screening 91.9% Teeth loss 15.6%
Veterans & disability
Veterans Count % Civilian veterans 25 10.2%
Disability % Any disability 19.5% Under 18 16.0% 18–64 years 9.4% 65 and over 31.7%
Health insurance coverage
Type % Private insurance 63.4% Public insurance 52.1% No insurance 5.4% Uninsured under 19 20.0%
Language & origin
Language spoken at home (age 5+)
Language Count % English only 277 93.6% 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) 296 100.0% Born in same state 296 100.0% Born in different state 206 69.6% Foreign born 0 0.0% Naturalized citizen 0 0.0% Not a US citizen 0 0.0%
Ancestry
Ancestry Count % Polish 92 31.1% Italian 12 4.1% Arab 11 3.7%
Ancestry Count % Dutch 6 2% English 3 1% French 3 1%
Technology access
Metric % of households Computer access 40.2% Internet access 77.3%
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 57261
What city is ZIP code 57261 in?
ZIP code 57261 is primarily assigned to Roslyn, South Dakota.
What county is ZIP code 57261 in?
ZIP code 57261 falls within Day County, South Dakota.
Does ZIP code 57261 have an older population?
47% of residents in ZIP code 57261 are 65 or older, above the national average of ~17%.
Does ZIP code 57261 have a large retiree population?
50% of households in ZIP code 57261 receive Social Security income, suggesting a significant retiree or disability population.
What is the typical home value in ZIP code 57261?
The median home value in ZIP code 57261 is $101,800.
Does ZIP code 57261 have a large veteran population?
10% of civilians in ZIP code 57261 are veterans, above the national average of ~7%.
What timezone is ZIP code 57261 in?
ZIP code 57261 observes the CST timezone.
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