57661 ZIP Code — Whitehorse, SD
Dewey County, South Dakota
ZIP code 57661 is located in Whitehorse, South Dakota, within Dewey County. It covers approximately 28.09 square miles and serves a population of 183 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 605.
183
population
28.09
sq mi land
Standard
ZIP type
Mountain (MT)
timezone
57661 ZIP code map
Cities in ZIP code 57661
Below are the cities the US Postal Service accepts for ZIP code 57661. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Whitehorse | Acceptable |
Demographics
updated 05/2026
| Population | |
|---|---|
| Total population | 183 |
| Population density | 7 / sq mi |
| State FIPS | 46 |
| County FIPS | 041 |
| Geography | |
|---|---|
| Land area | 28.09 sq mi |
| Water area | 0.19 sq mi |
| Latitude | 45.1844 |
| Longitude | -100.8406 |
| Timezone | Mountain (MT) |
| 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 | 48.6% | 56.2% | 41.7% |
| $50k – $100k | 32.4% | 26.8% | 33.8% |
| $100k – $200k | 18.9% | 14.6% | 20.1% |
| Over $200k | 0.0% | 2.4% | 4.4% |
Demographics & statistics
183
Population
7
People per sq mi
26.2
Median age
$60,893
Median household income
$13,620
Per capita income
$0
Median home value
$613
Median monthly rent
40.8%
Home ownership
24.6%
Poverty rate
27.6%
Unemployment
23
Housing units
0.0%
Bachelor's or higher
Age distribution
Male
Female
16
Under 5
14
7
5–9
7
3
10–14
2
6
15–19
6
15
20–24
13
13
25–34
12
2
35–44
1
17
45–54
15
4
55–59
4
8
60–64
7
3
65–74
2
3
75–84
3
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 57 | 31.1% |
| 18 and over | 126 | 68.9% |
| 65 and over | 11 | 6.0% |
| Median age | 26.2 years | |
Race & ethnicity
American Indian / Alaska Native
97.8%
Hispanic or Latino
1.1%
Two or more races
1.1%
| Group | Count | % |
|---|---|---|
| American Indian / Alaska Native | 181 | 97.8% |
| Hispanic or Latino | 2 | 1.1% |
| Two or more races | 2 | 1.1% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 48.6% | 56.2% | 41.7% |
| $50k – $100k | 32.4% | 26.8% | 33.8% |
| $100k – $200k | 18.9% | 14.6% | 20.1% |
| Over $200k | 0.0% | 2.4% | 4.4% |
Under $10k
10.2%
$10k–$15k
14.3%
$15k–$25k
8.2%
$35k–$50k
6.1%
$50k–$75k
51.0%
$75k–$100k
6.1%
$100k–$150k
4.1%
| Range | % of households |
|---|---|
| Under $10k | 10.2% |
| $10k–$15k | 14.3% |
| $15k–$25k | 8.2% |
| $35k–$50k | 6.1% |
| $50k–$75k | 51.0% |
| $75k–$100k | 6.1% |
| $100k–$150k | 4.1% |
| Median income | $60,893 |
Housing
Home values
Under $50k
35.0%
$50k–$100k
20.0%
$200k–$300k
25.0%
$300k–$500k
20.0%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $0 |
| Median rent / month | $613 |
| Owner occupied | 40.8% |
| Renter occupied | 59.2% |
| Vacant | 5.8% |
| Single-family detached | 86.5% |
| Large apartment buildings | 0.0% |
| Mobile homes | 0.0% |
| Median rooms | 5.0 |
| Avg household size (owned) | 3.70 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.0% |
| 2010–2019 | 0.0% |
| 2000–2009 | 11.5% |
| 1990–1999 | 1.9% |
| 1980–1989 | 28.8% |
| 1970–1979 | 51.9% |
| 1960–1969 | 5.8% |
| 1950–1959 | 0.0% |
| 1940–1949 | 0.0% |
| 1939 or earlier | 0.0% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 0.0% |
| 1 bedroom | 13.5% |
| 2 bedrooms | 11.5% |
| 3 bedrooms | 67.3% |
| 4 bedrooms | 7.7% |
| 5+ bedrooms | 0.0% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 0.0% |
| 1 vehicle | 59.2% |
| 2 vehicles | 22.4% |
| 3 or more | 18.4% |
Heating fuel
| Fuel type | % |
|---|---|
| Electricity | 38.8% |
| Propane / LP gas | 61.2% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 30 | 61.2% |
| Cohabiting couple | 11 | 22.4% |
| Male householder, no spouse | 8 | 16.3% |
| Female householder, no spouse | 0 | 0.0% |
| Households with children under 18 | 26 | 53.1% |
| Households with seniors (65+) | 8 | 16.3% |
| Average household size | 3.73 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 53.1% | 35.8% |
| Married | 34.6% | 64.2% |
| Separated | 0.0% | 0.0% |
| Widowed | 4.9% | 0.0% |
| Divorced | 7.4% | 0.0% |
Education
Less than 9th grade
6.4%
Some HS, no diploma
20.2%
HS graduate
38.3%
Some college, no degree
29.8%
Associate's degree
5.3%
Bachelor's degree
0.0%
Graduate / professional
0.0%
| Metric | % |
|---|---|
| HS diploma or higher | 73.4% |
| Bachelor's or higher | 0.0% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 0 | 0.0% |
| Kindergarten | 0 | 0.0% |
| Elementary school | 19 | 43.2% |
| High school | 12 | 27.3% |
| College / grad school | 13 | 29.5% |
Employment
Industry of employment
Public administration
43.7%
Agriculture & mining
23.9%
Education & healthcare
21.1%
Arts, food & hospitality
7.0%
Finance & real estate
4.2%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 25.4% |
| Service | 18.3% |
| Sales & office | 38.0% |
| Natural resources & construction | 14.1% |
| Production & transportation | 4.2% |
Employment type
| Type | % |
|---|---|
| Private sector | 23.9% |
| Government | 70.4% |
| Self-employed | 5.6% |
| Unpaid family workers | 0.0% |
Commute
| Method | % |
|---|---|
| Drive alone | 83.1% |
| Carpool | 5.6% |
| Public transit | 0.0% |
| Walk | 5.6% |
| Work from home | 5.6% |
| Other means | 0.0% |
| Avg commute (minutes) | 31.6 |
Poverty
All people
24.6%
Under 18 years
14.0%
18 and over
29.4%
Married-couple families
26.7%
Female-led households
100.0%
Income support
| Source | % of households |
|---|---|
| Social Security | 16.3% |
| Retirement income | 6.1% |
| Supplemental Security | 0.0% |
| Cash public assistance | 0.0% |
| Food stamps / SNAP | 8.2% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 42.8% |
| High blood pressure | 29.2% |
| High cholesterol | 24.0% |
| Diabetes | 12.2% |
| Heart disease | 6.2% |
| Stroke | 3.7% |
| Asthma | 11.7% |
| Arthritis | 19.9% |
| Kidney disease | 3.0% |
| Pulmonary disease | 6.8% |
| Cancer | 4.1% |
| Behavior / access | % |
|---|---|
| Smoking | 30.3% |
| Binge drinking | 21.7% |
| No physical activity | 28.1% |
| Less than 7 hrs sleep | 35.1% |
| Depression | 17.8% |
| Fair or poor health | 17.9% |
| Poor mental health | 16.0% |
| Poor physical health | 12.2% |
| No health insurance | 14.9% |
| Visited doctor (checkup) | 73.7% |
| Visited dentist | 59.5% |
| Cholesterol screening | 82.1% |
| Teeth loss | 24.2% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 4 | 3.2% |
| Disability | % |
|---|---|
| Any disability | 6.0% |
| Under 18 | 0.0% |
| 18–64 years | 7.0% |
| 65 and over | 27.3% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 13.1% |
| Public insurance | 21.9% |
| No insurance | 66.1% |
| Uninsured under 19 | 62.3% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 153 | 83.6% |
| 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) | 183 | 100.0% |
| Born in same state | 181 | 98.9% |
| Born in different state | 173 | 94.5% |
| Foreign born | 2 | 1.1% |
| Naturalized citizen | 0 | 0.0% |
| Not a US citizen | 0 | 0.0% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 26.8% |
| Internet access | 67.3% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 57661
What city is ZIP code 57661 in?
ZIP code 57661 is primarily assigned to Whitehorse, South Dakota.
What county is ZIP code 57661 in?
ZIP code 57661 falls within Dewey County, South Dakota.
Is ZIP code 57661 family-oriented?
31% of residents in ZIP code 57661 are under 18, reflecting a younger, family-oriented community.
What is the poverty rate in ZIP code 57661?
25% of residents in ZIP code 57661 live below the poverty line, above the national average.
Is ZIP code 57661 mostly rentals?
59% of occupied units in ZIP code 57661 are renter-occupied.
What is the population of ZIP code 57661?
ZIP code 57661 has an estimated population of 183 residents, with a density of 7 people per square mile.
What timezone is ZIP code 57661 in?
ZIP code 57661 observes the MST timezone.