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South Dakota ZIP Codes
Lyman County
Lower Brule, SD
57548
57548 ZIP Code — Lower Brule, SD
Lyman County, South Dakota
ZIP code 57548 is located in
Lower Brule ,
South Dakota ,
within Lyman County .
It covers approximately 95.19 square miles and serves a population of
1,651 residents.
This is a standard ZIP code in the Central (CT) timezone,
served by area code 605 .
About ZIP code 57548
The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1970s, giving the area an established character. Median home value is $52,900. Renters make up the majority at 68%, typical of denser urban areas.
Median household income is $32,500. Poverty affects 48% of residents, above the national average. SNAP benefit usage at 37% of households reflects economic stress in the area.
The dominant occupation class is service, with education and healthcare as the leading industry. The average commute of 10 minutes is near the national average.
College attainment at 9% is below the national average, consistent with a trades and production-oriented local economy.
Health indicators show elevated rates of obesity (46%), smoking (39%) compared to national benchmarks. 41% of residents lack health insurance, above the national average.
Overall, ZIP code 57548 reflects a community defined by a trades-oriented workforce, economic challenges above the national average, and elevated reliance on food assistance.
57548 ZIP code map
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Cities in ZIP code 57548
Below are the cities the US Postal Service accepts for ZIP code 57548. Using any city not on this list may result in mail delivery delays.
Nearby ZIP codes
Demographics
updated 05/2026
Population
Total population
1,651
Population density
17 / sq mi
State FIPS
46
County FIPS
085
Geography
Land area
95.19 sq mi
Water area
31.56 sq mi
Latitude
44.0659
Longitude
-99.7063
Timezone
Central (CT)
Area code
605
Economics
updated 05/2026
Household income
Income range
This ZIP
County avg
State avg
Under $50k
66.6%
43.2%
41.7%
$50k – $100k
25.6%
40.1%
33.8%
$100k – $200k
7.6%
14.7%
20.1%
Over $200k
0.2%
2.0%
4.4%
Demographics & statistics
$32,500
Median household income
Age distribution
Age summary
Group Count % Under 18 637 38.6% 18 and over 1,014 61.4% 65 and over 174 10.5% Median age 24.9 years
Race & ethnicity
American Indian / Alaska Native
90.5%
Group Count % American Indian / Alaska Native 1,504 90.5% White 123 7.4% Hispanic or Latino 11 0.7% Other race 11 0.7% Asian 7 0.4% Two or more races 6 0.4%
Household income
Income range
This ZIP
County avg
State avg
Under $50k
66.6%
43.2%
41.7%
$50k – $100k
25.6%
40.1%
33.8%
$100k – $200k
7.6%
14.7%
20.1%
Over $200k
0.2%
2.0%
4.4%
Range % of households Under $10k 15.4% $10k–$15k 10.3% $15k–$25k 15.7% $25k–$35k 10.9% $35k–$50k 11.7% $50k–$75k 19.4% $75k–$100k 5.1% $100k–$150k 9.4% $150k–$200k 1.4% $200k+ 0.6% Median income $32,500
Housing
Housing overview
Metric Value Median home value $52,900 Median rent / month $457 Owner occupied 32.3% Renter occupied 67.7% Vacant 15.3% Single-family detached 72.4% Large apartment buildings 0.5% Mobile homes 13.8% Median rooms 5.2 Avg household size (owned) 5.04
Year built
Era % 2020 or later 0.0% 2010–2019 1.5% 2000–2009 8.0% 1990–1999 14.5% 1980–1989 20.8% 1970–1979 32.9% 1960–1969 17.7% 1950–1959 2.7% 1940–1949 1.0% 1939 or earlier 1.0%
Bedrooms
Size % of units No bedroom (studio) 0.5% 1 bedroom 9.0% 2 bedrooms 20.6% 3 bedrooms 53.8% 4 bedrooms 10.7% 5+ bedrooms 5.6%
Vehicles per household
Vehicles % of households No vehicle 24.9% 1 vehicle 37.1% 2 vehicles 24.9% 3 or more 13.1%
Heating fuel
Fuel type % Electricity 21.4% Propane / LP gas 76.3% Fuel oil 2.3%
Households & families
Household type Count % Married-couple family 65 18.6% Cohabiting couple 40 11.4% Male householder, no spouse 111 31.7% Female householder, no spouse 134 38.3% Households with children under 18 161 46.0% Households with seniors (65+) 86 24.6% Average household size 4.47
Marital status
Status Male Female Never married 63.3% 56.9% Married 13.9% 20.7% Separated 0.7% 2.4% Widowed 12.1% 7.8% Divorced 10.1% 12.1%
Education
Some HS, no diploma
13.7%
Some college, no degree
25.8%
Graduate / professional
7.3%
Metric % HS diploma or higher 84.8% Bachelor's or higher 9.1%
School enrollment (ages 3–17)
Type Count % Nursery / preschool 75 13.2% Kindergarten 56 9.8% Elementary school 273 48.0% High school 130 22.8% College / grad school 35 6.2%
Employment
Industry of employment
Education & healthcare
34.5%
Public administration
21.1%
Arts, food & hospitality
15.0%
Finance & real estate
6.6%
Professional & management
4.5%
Agriculture & mining
2.3%
Transportation & utilities
2.1%
Occupation
Category % Management, business & arts 30.8% Service 32.6% Sales & office 15.7% Natural resources & construction 7.3% Production & transportation 13.6%
Employment type
Type % Private sector 36.9% Government 62.4% Self-employed 0.7% Unpaid family workers 0.0%
Commute
Method % Drive alone 73.1% Carpool 16.4% Public transit 1.0% Walk 2.1% Work from home 0.2% Other means 7.1% Avg commute (minutes) 9.6
Poverty
Married-couple families
12.3%
Female-led households
62.9%
Income support
Source % of households Social Security 26.9% Retirement income 12.6% Supplemental Security 8.6% Cash public assistance 26.0% Food stamps / SNAP 37.4%
Health indicators
Condition % Obesity 46.2% High blood pressure 32.7% High cholesterol 25.0% Diabetes 14.9% Heart disease 7.6% Stroke 5.0% Asthma 13.7% Arthritis 22.8% Kidney disease 3.9% Pulmonary disease 9.6% Cancer 4.2%
Behavior / access % Smoking 39.2% Binge drinking 20.0% No physical activity 36.0% Less than 7 hrs sleep 37.3% Depression 20.0% Fair or poor health 25.7% Poor mental health 18.7% Poor physical health 16.1% No health insurance 18.6% Visited doctor (checkup) 74.5% Visited dentist 43.3% Cholesterol screening 79.1% Teeth loss 34.4%
Veterans & disability
Veterans Count % Civilian veterans 34 3.4%
Disability % Any disability 16.7% Under 18 1.7% 18–64 years 19.3% 65 and over 59.2%
Health insurance coverage
Type % Private insurance 23.5% Public insurance 39.8% No insurance 40.6% Uninsured under 19 33.9%
Language & origin
Language spoken at home (age 5+)
Language Count % English only 1,480 89.6% Spanish 15 1.0% Other Indo-European 0 0.0% Asian & Pacific Islander 12 0.8% Other languages 0 0.0%
Place of birth & citizenship
Origin Count % Native born (US) 1,634 99.0% Born in same state 1,631 98.8% Born in different state 1,465 88.7% Foreign born 3 0.2% Naturalized citizen 17 1.0% Not a US citizen 0 0.0%
Ancestry
Ancestry Count % Arab 35 2.1% Italian 22 1.3% French 7 0.4%
Ancestry Count % English 5 0.3% Polish 1 0.1%
Technology access
Metric % of households Computer access 21.2% Internet access 78.9%
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 57548
What city is ZIP code 57548 in?
ZIP code 57548 is primarily assigned to Lower Brule, South Dakota.
What county is ZIP code 57548 in?
ZIP code 57548 falls within Lyman County, South Dakota.
What is the poverty rate in ZIP code 57548?
48% of residents in ZIP code 57548 live below the poverty line, above the national average.
Is ZIP code 57548 family-oriented?
39% of residents in ZIP code 57548 are under 18, reflecting a younger, family-oriented community.
Is ZIP code 57548 mostly rentals?
68% of occupied units in ZIP code 57548 are renter-occupied.
How educated is the population of ZIP code 57548?
9% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.
What timezone is ZIP code 57548 in?
ZIP code 57548 observes the CST timezone.
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