57775 ZIP Code — Quinn, SD
Pennington County, South Dakota
ZIP code 57775 is located in Quinn, South Dakota, within Pennington County. It covers approximately 291.33 square miles and serves a population of 358 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 605.
About ZIP code 57775
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 76%, well above the national average.
Median household income is $88,333.
The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 13 minutes is near the national average.
Educational attainment is near the national average, with 25% of residents holding a bachelor's degree or higher.
358
population
291.33
sq mi land
Standard
ZIP type
Mountain (MT)
timezone
57775 ZIP code map
Cities in ZIP code 57775
Below are the cities the US Postal Service accepts for ZIP code 57775. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Quinn | Acceptable |
| Quinn | Preferred |
Nearby ZIP codes
Demographics
updated 05/2026
| Population | |
|---|---|
| Total population | 358 |
| Population density | 1 / sq mi |
| State FIPS | 46 |
| County FIPS | 103 |
| Geography | |
|---|---|
| Land area | 291.33 sq mi |
| Water area | 1.46 sq mi |
| Latitude | 44.0814 |
| Longitude | -102.1176 |
| 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 | 14.5% | 42.3% | 41.7% |
| $50k – $100k | 55.5% | 33.3% | 33.8% |
| $100k – $200k | 11.8% | 19.2% | 20.1% |
| Over $200k | 18.2% | 5.2% | 4.4% |
Demographics & statistics
358
Population
1
People per sq mi
33.5
Median age
$88,333
Median household income
$34,829
Per capita income
$0
Median home value
$0
Median monthly rent
76.0%
Home ownership
0.3%
Poverty rate
0.0%
Unemployment
138
Housing units
25.0%
Bachelor's or higher
Age distribution
Male
Female
37
Under 5
35
10
5–9
9
12
10–14
12
11
15–19
10
1
20–24
1
39
25–34
36
17
35–44
15
15
45–54
13
13
55–59
12
9
60–64
9
15
65–74
14
3
75–84
3
4
85+
3
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 123 | 34.4% |
| 18 and over | 235 | 65.6% |
| 65 and over | 42 | 11.7% |
| Median age | 33.5 years | |
Race & ethnicity
White
90.4%
Two or more races
5.2%
Hispanic or Latino
1.9%
Other race
1.9%
American Indian / Alaska Native
0.5%
| Group | Count | % |
|---|---|---|
| White | 330 | 90.4% |
| Two or more races | 19 | 5.2% |
| Hispanic or Latino | 7 | 1.9% |
| Other race | 7 | 1.9% |
| American Indian / Alaska Native | 2 | 0.5% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 14.5% | 42.3% | 41.7% |
| $50k – $100k | 55.5% | 33.3% | 33.8% |
| $100k – $200k | 11.8% | 19.2% | 20.1% |
| Over $200k | 18.2% | 5.2% | 4.4% |
Under $10k
1.0%
$25k–$35k
2.0%
$35k–$50k
14.0%
$50k–$75k
30.0%
$75k–$100k
17.0%
$100k–$150k
12.0%
$150k–$200k
11.0%
$200k+
13.0%
| Range | % of households |
|---|---|
| Under $10k | 1.0% |
| $25k–$35k | 2.0% |
| $35k–$50k | 14.0% |
| $50k–$75k | 30.0% |
| $75k–$100k | 17.0% |
| $100k–$150k | 12.0% |
| $150k–$200k | 11.0% |
| $200k+ | 13.0% |
| Median income | $88,333 |
Housing
Home values
Under $50k
9.2%
$50k–$100k
44.7%
$150k–$200k
14.5%
$200k–$300k
11.8%
$300k–$500k
3.9%
$500k–$1M
3.9%
$1M+
11.8%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $0 |
| Median rent / month | $0 |
| Owner occupied | 76.0% |
| Renter occupied | 24.0% |
| Vacant | 38.3% |
| Single-family detached | 85.8% |
| Large apartment buildings | 0.0% |
| Mobile homes | 14.2% |
| Median rooms | 6.6 |
| Avg household size (owned) | 3.92 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.0% |
| 2010–2019 | 1.2% |
| 2000–2009 | 1.9% |
| 1990–1999 | 4.9% |
| 1980–1989 | 13.6% |
| 1970–1979 | 11.7% |
| 1960–1969 | 4.9% |
| 1950–1959 | 24.1% |
| 1940–1949 | 12.3% |
| 1939 or earlier | 25.3% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 0.0% |
| 1 bedroom | 1.2% |
| 2 bedrooms | 37.0% |
| 3 bedrooms | 31.5% |
| 4 bedrooms | 25.9% |
| 5+ bedrooms | 4.3% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 0.0% |
| 1 vehicle | 22.0% |
| 2 vehicles | 33.0% |
| 3 or more | 45.0% |
Heating fuel
| Fuel type | % |
|---|---|
| Electricity | 29.0% |
| Propane / LP gas | 41.0% |
| Wood | 30.0% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 77 | 77.0% |
| Cohabiting couple | 0 | 0.0% |
| Male householder, no spouse | 19 | 19.0% |
| Female householder, no spouse | 4 | 4.0% |
| Households with children under 18 | 47 | 47.0% |
| Households with seniors (65+) | 30 | 30.0% |
| Average household size | 3.58 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 7.9% | 13.8% |
| Married | 78.7% | 82.8% |
| Separated | 0.0% | 0.0% |
| Widowed | 7.1% | 3.4% |
| Divorced | 6.3% | 0.0% |
Education
Less than 9th grade
8.2%
Some HS, no diploma
1.4%
HS graduate
21.8%
Some college, no degree
36.4%
Associate's degree
7.3%
Bachelor's degree
25.0%
Graduate / professional
0.0%
| Metric | % |
|---|---|
| HS diploma or higher | 90.5% |
| Bachelor's or higher | 25.0% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 0 | 0.0% |
| Kindergarten | 2 | 3.6% |
| Elementary school | 27 | 48.2% |
| High school | 21 | 37.5% |
| College / grad school | 6 | 10.7% |
Employment
Industry of employment
Education & healthcare
31.5%
Wholesale trade
16.0%
Arts, food & hospitality
15.0%
Agriculture & mining
10.5%
Retail trade
8.0%
Manufacturing
6.0%
Professional & management
4.0%
Construction
3.0%
Finance & real estate
3.0%
Information
2.0%
Other services
1.0%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 52.0% |
| Service | 12.5% |
| Sales & office | 22.0% |
| Natural resources & construction | 9.5% |
| Production & transportation | 4.0% |
Employment type
| Type | % |
|---|---|
| Private sector | 71.0% |
| Government | 19.0% |
| Self-employed | 10.0% |
| Unpaid family workers | 0.0% |
Commute
| Method | % |
|---|---|
| Drive alone | 74.9% |
| Carpool | 4.8% |
| Public transit | 0.0% |
| Walk | 0.0% |
| Work from home | 9.1% |
| Other means | 11.2% |
| Avg commute (minutes) | 12.7 |
Poverty
All people
0.3%
Under 18 years
0.0%
18 and over
0.4%
Married-couple families
0.0%
Female-led households
0.0%
Income support
| Source | % of households |
|---|---|
| Social Security | 29.0% |
| Retirement income | 20.0% |
| Supplemental Security | 3.0% |
| Cash public assistance | 0.0% |
| Food stamps / SNAP | 12.0% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 34.2% |
| High blood pressure | 34.5% |
| High cholesterol | 34.4% |
| Diabetes | 10.2% |
| Heart disease | 7.6% |
| Stroke | 3.3% |
| Asthma | 8.9% |
| Arthritis | 26.4% |
| Kidney disease | 3.1% |
| Pulmonary disease | 6.6% |
| Cancer | 7.6% |
| Behavior / access | % |
|---|---|
| Smoking | 18.7% |
| Binge drinking | 18.6% |
| No physical activity | 22.9% |
| Less than 7 hrs sleep | 28.0% |
| Depression | 15.6% |
| Fair or poor health | 12.4% |
| Poor mental health | 10.5% |
| Poor physical health | 9.5% |
| No health insurance | 11.9% |
| Visited doctor (checkup) | 75.8% |
| Visited dentist | 65.9% |
| Cholesterol screening | 89.8% |
| Teeth loss | 13.6% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 17 | 7.2% |
| Disability | % |
|---|---|
| Any disability | 3.9% |
| Under 18 | 0.0% |
| 18–64 years | 4.1% |
| 65 and over | 14.3% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 78.2% |
| Public insurance | 15.6% |
| No insurance | 14.5% |
| Uninsured under 19 | 20.6% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 286 | 79.9% |
| 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) | 358 | 100.0% |
| Born in same state | 358 | 100.0% |
| Born in different state | 242 | 67.6% |
| Foreign born | 0 | 0.0% |
| Naturalized citizen | 0 | 0.0% |
| Not a US citizen | 0 | 0.0% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| Italian | 36 | 10.1% |
| French | 34 | 9.5% |
| Arab | 21 | 5.9% |
| Ancestry | Count | % |
|---|---|---|
| Polish | 15 | 4.2% |
| Dutch | 4 | 1.1% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 27.9% |
| Internet access | 97.0% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 57775
What city is ZIP code 57775 in?
ZIP code 57775 is primarily assigned to Quinn, South Dakota.
What county is ZIP code 57775 in?
ZIP code 57775 falls within Pennington County, South Dakota.
Is ZIP code 57775 family-oriented?
34% of residents in ZIP code 57775 are under 18, reflecting a younger, family-oriented community.
What is the population of ZIP code 57775?
ZIP code 57775 has an estimated population of 358 residents, with a density of 1 people per square mile.
What is the median household income in ZIP code 57775?
The median household income in ZIP code 57775 is $88,333, above the national median of ~$75,000.
What timezone is ZIP code 57775 in?
ZIP code 57775 observes the MST timezone.