57630 ZIP Code — Glencross, SD
Dewey County, South Dakota
ZIP code 57630 is located in Glencross, South Dakota, within Dewey County. It covers approximately 109.98 square miles and serves a population of 31 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 605.
31
population
109.98
sq mi land
Standard
ZIP type
Mountain (MT)
timezone
57630 ZIP code map
Cities in ZIP code 57630
Below are the cities the US Postal Service accepts for ZIP code 57630. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Glencross | Acceptable |
Demographics
updated 05/2026
| Population | |
|---|---|
| Total population | 31 |
| Population density | 0 / sq mi |
| State FIPS | 46 |
| County FIPS | 041 |
| Geography | |
|---|---|
| Land area | 109.98 sq mi |
| Water area | 0.16 sq mi |
| Latitude | 45.4297 |
| Longitude | -100.8857 |
| 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 | 25.0% | 56.2% | 41.7% |
| $50k – $100k | 20.0% | 26.8% | 33.8% |
| $100k – $200k | 55.0% | 14.6% | 20.1% |
| Over $200k | 0.0% | 2.4% | 4.4% |
Demographics & statistics
31
Population
59.6
Median age
$0
Median household income
$78,477
Per capita income
$200,000
Median home value
$0
Median monthly rent
100.0%
Home ownership
22.6%
Poverty rate
0.0%
Unemployment
23
Housing units
38.7%
Bachelor's or higher
Age distribution
Male
Female
5
45–54
4
4
55–59
4
4
60–64
4
2
65–74
2
1
85+
1
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 0 | 0.0% |
| 18 and over | 31 | 100.0% |
| 65 and over | 6 | 19.4% |
| Median age | 59.6 years | |
Race & ethnicity
White
83.9%
American Indian / Alaska Native
16.1%
| Group | Count | % |
|---|---|---|
| White | 26 | 83.9% |
| American Indian / Alaska Native | 5 | 16.1% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 25.0% | 56.2% | 41.7% |
| $50k – $100k | 20.0% | 26.8% | 33.8% |
| $100k – $200k | 55.0% | 14.6% | 20.1% |
| Over $200k | 0.0% | 2.4% | 4.4% |
$10k–$15k
15.0%
$35k–$50k
15.0%
$50k–$75k
20.0%
$150k–$200k
30.0%
$200k+
20.0%
| Range | % of households |
|---|---|
| $10k–$15k | 15.0% |
| $35k–$50k | 15.0% |
| $50k–$75k | 20.0% |
| $150k–$200k | 30.0% |
| $200k+ | 20.0% |
| Median income | $0 |
Housing
Home values
Under $50k
10.0%
$50k–$100k
10.0%
$100k–$150k
20.0%
$150k–$200k
10.0%
$200k–$300k
15.0%
$300k–$500k
20.0%
$1M+
15.0%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $200,000 |
| Median rent / month | $0 |
| Owner occupied | 100.0% |
| Renter occupied | 0.0% |
| Vacant | 13.0% |
| Single-family detached | 87.0% |
| Large apartment buildings | 0.0% |
| Mobile homes | 0.0% |
| Median rooms | 6.4 |
| Avg household size (owned) | 1.55 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.0% |
| 2010–2019 | 13.0% |
| 2000–2009 | 26.1% |
| 1990–1999 | 0.0% |
| 1980–1989 | 0.0% |
| 1970–1979 | 0.0% |
| 1960–1969 | 13.0% |
| 1950–1959 | 8.7% |
| 1940–1949 | 17.4% |
| 1939 or earlier | 21.7% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 0.0% |
| 1 bedroom | 8.7% |
| 2 bedrooms | 21.7% |
| 3 bedrooms | 30.4% |
| 4 bedrooms | 8.7% |
| 5+ bedrooms | 30.4% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 0.0% |
| 1 vehicle | 0.0% |
| 2 vehicles | 70.0% |
| 3 or more | 30.0% |
Heating fuel
| Fuel type | % |
|---|---|
| Electricity | 10.0% |
| Propane / LP gas | 70.0% |
| Fuel oil | 20.0% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 9 | 45.0% |
| Cohabiting couple | 0 | 0.0% |
| Male householder, no spouse | 7 | 35.0% |
| Female householder, no spouse | 4 | 20.0% |
| Households with children under 18 | 0 | 0.0% |
| Households with seniors (65+) | 5 | 25.0% |
| Average household size | 1.55 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 41.2% | 0.0% |
| Married | 58.8% | 71.4% |
| Separated | 0.0% | 0.0% |
| Widowed | 0.0% | 28.6% |
| Divorced | 0.0% | 0.0% |
Education
Less than 9th grade
0.0%
Some HS, no diploma
0.0%
HS graduate
29.0%
Some college, no degree
16.1%
Associate's degree
16.1%
Bachelor's degree
25.8%
Graduate / professional
12.9%
| Metric | % |
|---|---|
| HS diploma or higher | 100.0% |
| Bachelor's or higher | 38.7% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 0 | 0.0% |
| Kindergarten | 0 | 0.0% |
| Elementary school | 0 | 0.0% |
| High school | 0 | 0.0% |
| College / grad school | 0 | 0.0% |
Employment
Industry of employment
Agriculture & mining
43.8%
Professional & management
25.0%
Retail trade
18.8%
Public administration
12.5%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 81.3% |
| Service | 0.0% |
| Sales & office | 0.0% |
| Natural resources & construction | 0.0% |
| Production & transportation | 18.8% |
Employment type
| Type | % |
|---|---|
| Private sector | 43.8% |
| Government | 12.5% |
| Self-employed | 43.8% |
| Unpaid family workers | 0.0% |
Commute
| Method | % |
|---|---|
| Drive alone | 56.3% |
| Carpool | 0.0% |
| Public transit | 0.0% |
| Walk | 0.0% |
| Work from home | 43.8% |
| Other means | 0.0% |
| Avg commute (minutes) | 0.0 |
Poverty
All people
22.6%
Under 18 years
0.0%
18 and over
22.6%
Married-couple families
33.3%
Female-led households
0.0%
Income support
| Source | % of households |
|---|---|
| Social Security | 50.0% |
| Retirement income | 30.0% |
| Supplemental Security | 0.0% |
| Cash public assistance | 0.0% |
| Food stamps / SNAP | 0.0% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 0.0% |
| High blood pressure | 0.0% |
| High cholesterol | 0.0% |
| Diabetes | 0.0% |
| Heart disease | 0.0% |
| Stroke | 0.0% |
| Asthma | 0.0% |
| Arthritis | 0.0% |
| Kidney disease | 0.0% |
| Pulmonary disease | 0.0% |
| Cancer | 0.0% |
| Behavior / access | % |
|---|---|
| Smoking | 0.0% |
| Binge drinking | 0.0% |
| No physical activity | 0.0% |
| Less than 7 hrs sleep | 0.0% |
| Depression | 0.0% |
| Fair or poor health | 0.0% |
| Poor mental health | 0.0% |
| Poor physical health | 0.0% |
| No health insurance | 0.0% |
| Visited doctor (checkup) | 0.0% |
| Visited dentist | 0.0% |
| Cholesterol screening | 0.0% |
| Teeth loss | 0.0% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 6 | 19.4% |
| Disability | % |
|---|---|
| Any disability | 22.6% |
| Under 18 | 0.0% |
| 18–64 years | 12.0% |
| 65 and over | 66.7% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 48.4% |
| Public insurance | 35.5% |
| No insurance | 22.6% |
| Uninsured under 19 | 0.0% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 31 | 100.0% |
| 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) | 31 | 100.0% |
| Born in same state | 31 | 100.0% |
| Born in different state | 20 | 64.5% |
| Foreign born | 0 | 0.0% |
| Naturalized citizen | 0 | 0.0% |
| Not a US citizen | 0 | 0.0% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| French | 4 | 12.9% |
| Arab | 4 | 12.9% |
| Ancestry | Count | % |
|---|---|---|
| Polish | 3 | 9.7% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 64.5% |
| Internet access | 90.0% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 57630
What city is ZIP code 57630 in?
ZIP code 57630 is primarily assigned to Glencross, South Dakota.
What county is ZIP code 57630 in?
ZIP code 57630 falls within Dewey County, South Dakota.
Does ZIP code 57630 have a large retiree population?
50% of households in ZIP code 57630 receive Social Security income, suggesting a significant retiree or disability population.
What is the poverty rate in ZIP code 57630?
23% of residents in ZIP code 57630 live below the poverty line, above the national average.
Does ZIP code 57630 have a large veteran population?
19% of civilians in ZIP code 57630 are veterans, above the national average of ~7%.
What is the population of ZIP code 57630?
ZIP code 57630 has an estimated population of 31 residents.
What timezone is ZIP code 57630 in?
ZIP code 57630 observes the MST timezone.