57420 ZIP Code — Akaska, SD
Walworth County, South Dakota
ZIP code 57420 is located in Akaska, South Dakota, within Walworth County. It covers approximately 44.27 square miles and serves a population of 186 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 605.
186
population
44.27
sq mi land
Standard
ZIP type
Central (CT)
timezone
57420 ZIP code map
Cities in ZIP code 57420
Below are the cities the US Postal Service accepts for ZIP code 57420. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Akaska | Acceptable |
Demographics
updated 06/2026
| Population | |
|---|---|
| Total population | 186 |
| Population density | 4 / sq mi |
| State FIPS | 46 |
| County FIPS | 129 |
| Geography | |
|---|---|
| Land area | 44.27 sq mi |
| Water area | 0.02 sq mi |
| Latitude | 45.3190 |
| Longitude | -100.1742 |
| Timezone | Central (CT) |
| Area code | 605 |
Total population by age
Gender
Race & ethnicity
Economics
updated 06/2026
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 67.4% | 48.9% | 41.7% |
| $50k – $100k | 18.6% | 30.4% | 33.8% |
| $100k – $200k | 14.0% | 16.3% | 20.1% |
| Over $200k | 0.0% | 4.4% | 4.4% |
Demographics & statistics
186
Population
4
People per sq mi
37.1
Median age
$45,417
Median household income
$16,065
Per capita income
$102,800
Median home value
$0
Median monthly rent
83.1%
Home ownership
38.7%
Poverty rate
0.0%
Unemployment
133
Housing units
32.5%
Bachelor's or higher
Age distribution
Male
Female
38
Under 5
17
6
5–9
3
1
10–14
0
1
15–19
0
18
25–34
8
10
35–44
4
1
45–54
1
1
55–59
1
8
60–64
4
36
65–74
16
7
75–84
3
1
85+
1
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 66 | 35.5% |
| 18 and over | 120 | 64.5% |
| 65 and over | 64 | 34.4% |
| Median age | 37.1 years | |
Race & ethnicity
White
100%
| Group | Count | % |
|---|---|---|
| White | 186 | 100% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 67.4% | 48.9% | 41.7% |
| $50k – $100k | 18.6% | 30.4% | 33.8% |
| $100k – $200k | 14.0% | 16.3% | 20.1% |
| Over $200k | 0.0% | 4.4% | 4.4% |
Under $10k
27.7%
$25k–$35k
1.5%
$35k–$50k
24.6%
$50k–$75k
27.7%
$75k–$100k
1.5%
$100k–$150k
16.9%
| Range | % of households |
|---|---|
| Under $10k | 27.7% |
| $25k–$35k | 1.5% |
| $35k–$50k | 24.6% |
| $50k–$75k | 27.7% |
| $75k–$100k | 1.5% |
| $100k–$150k | 16.9% |
| Median income | $45,417 |
Housing
Home values
Under $50k
3.7%
$50k–$100k
44.4%
$100k–$150k
29.6%
$150k–$200k
14.8%
$200k–$300k
1.9%
$300k–$500k
3.7%
$1M+
1.9%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $102,800 |
| Median rent / month | $0 |
| Owner occupied | 83.1% |
| Renter occupied | 16.9% |
| Vacant | 54.9% |
| Single-family detached | 45.1% |
| Large apartment buildings | 0.0% |
| Mobile homes | 54.9% |
| Median rooms | 4.9 |
| Avg household size (owned) | 2.50 |
Year built
| Era | % |
|---|---|
| 2020 or later | 5.6% |
| 2010–2019 | 9.7% |
| 2000–2009 | 22.2% |
| 1990–1999 | 11.1% |
| 1980–1989 | 10.4% |
| 1970–1979 | 14.6% |
| 1960–1969 | 6.9% |
| 1950–1959 | 6.9% |
| 1940–1949 | 0.0% |
| 1939 or earlier | 12.5% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 0.7% |
| 1 bedroom | 3.5% |
| 2 bedrooms | 35.4% |
| 3 bedrooms | 49.3% |
| 4 bedrooms | 9.7% |
| 5+ bedrooms | 1.4% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 0.0% |
| 1 vehicle | 9.2% |
| 2 vehicles | 32.3% |
| 3 or more | 58.5% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 3.1% |
| Electricity | 1.5% |
| Propane / LP gas | 83.1% |
| Wood | 9.2% |
| No fuel used | 1.5% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 55 | 84.6% |
| Cohabiting couple | 6 | 9.2% |
| Male householder, no spouse | 1 | 1.5% |
| Female householder, no spouse | 3 | 4.6% |
| Households with children under 18 | 25 | 38.5% |
| Households with seniors (65+) | 39 | 60.0% |
| Average household size | 2.86 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 0.0% | 12.3% |
| Married | 89.1% | 82.5% |
| Separated | 0.0% | 0.0% |
| Widowed | 1.6% | 5.3% |
| Divorced | 9.4% | 0.0% |
Education
Less than 9th grade
2.5%
Some HS, no diploma
1.7%
HS graduate
30.8%
Some college, no degree
27.5%
Associate's degree
5.0%
Bachelor's degree
31.7%
Graduate / professional
0.8%
| Metric | % |
|---|---|
| HS diploma or higher | 95.8% |
| Bachelor's or higher | 32.5% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 0 | 0.0% |
| Kindergarten | 11 | 50.0% |
| Elementary school | 10 | 45.5% |
| High school | 1 | 4.5% |
| College / grad school | 0 | 0.0% |
Employment
Industry of employment
Agriculture & mining
90.3%
Manufacturing
3.2%
Retail trade
3.2%
Transportation & utilities
3.2%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 87.1% |
| Service | 6.5% |
| Sales & office | 6.5% |
| Natural resources & construction | 0.0% |
| Production & transportation | 0.0% |
Employment type
| Type | % |
|---|---|
| Private sector | 16.1% |
| Government | 3.2% |
| Self-employed | 80.6% |
| Unpaid family workers | 0.0% |
Commute
| Method | % |
|---|---|
| Drive alone | 54.8% |
| Carpool | 0.0% |
| Public transit | 0.0% |
| Walk | 0.0% |
| Work from home | 45.2% |
| Other means | 0.0% |
| Avg commute (minutes) | 0.0 |
Poverty
All people
38.7%
Under 18 years
50.0%
18 and over
32.5%
Married-couple families
32.7%
Female-led households
0.0%
Income support
| Source | % of households |
|---|---|
| Social Security | 49.2% |
| Retirement income | 36.9% |
| Supplemental Security | 0.0% |
| Cash public assistance | 0.0% |
| Food stamps / SNAP | 9.2% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 31.3% |
| High blood pressure | 38.6% |
| High cholesterol | 36.9% |
| Diabetes | 11.5% |
| Heart disease | 9.8% |
| Stroke | 4.0% |
| Asthma | 7.9% |
| Arthritis | 29.6% |
| Kidney disease | 3.7% |
| Pulmonary disease | 7.1% |
| Cancer | 10.3% |
| Behavior / access | % |
|---|---|
| Smoking | 15.4% |
| Binge drinking | 16.3% |
| No physical activity | 24.2% |
| Less than 7 hrs sleep | 27.0% |
| Depression | 13.6% |
| Fair or poor health | 11.8% |
| Poor mental health | 8.9% |
| Poor physical health | 9.0% |
| No health insurance | 12.1% |
| Visited doctor (checkup) | 77.7% |
| Visited dentist | 69.0% |
| Cholesterol screening | 90.9% |
| Teeth loss | 13.1% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 21 | 17.5% |
| Disability | % |
|---|---|
| Any disability | 10.2% |
| Under 18 | 0.0% |
| 18–64 years | 14.3% |
| 65 and over | 17.2% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 31.7% |
| Public insurance | 38.2% |
| No insurance | 51.6% |
| Uninsured under 19 | 97.0% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 131 | 70.4% |
| 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) | 186 | 100.0% |
| Born in same state | 186 | 100.0% |
| Born in different state | 153 | 82.3% |
| Foreign born | 0 | 0.0% |
| Naturalized citizen | 0 | 0.0% |
| Not a US citizen | 0 | 0.0% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| English | 47 | 25.3% |
| French | 15 | 8.1% |
| Ancestry | Count | % |
|---|---|---|
| Italian | 12 | 6.5% |
| Polish | 2 | 1.1% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 34.9% |
| Internet access | 96.9% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 57420
What city is ZIP code 57420 in?
ZIP code 57420 is primarily assigned to Akaska, South Dakota.
What county is ZIP code 57420 in?
ZIP code 57420 falls within Walworth County, South Dakota.
What is the poverty rate in ZIP code 57420?
39% of residents in ZIP code 57420 live below the poverty line, above the national average.
Does ZIP code 57420 have an older population?
34% of residents in ZIP code 57420 are 65 or older, above the national average of ~17%.
Does ZIP code 57420 have a large retiree population?
49% of households in ZIP code 57420 receive Social Security income, suggesting a significant retiree or disability population.
Does ZIP code 57420 have a large veteran population?
18% of civilians in ZIP code 57420 are veterans, above the national average of ~7%.
What timezone is ZIP code 57420 in?
ZIP code 57420 observes the CST timezone.