57544 ZIP Code — Kennebec, SD

Lyman County, South Dakota

ZIP code 57544 is located in Kennebec, South Dakota, within Lyman County. It covers approximately 252.04 square miles and serves a population of 451 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 605.

About ZIP code 57544

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $131,400. Owner-occupancy is high at 84%, well above the national average.

The gap between median ($71,389) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 7% is below the national average. 48% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 8 minutes is near the national average.

Educational attainment is near the national average, with 23% of residents holding a bachelor's degree or higher.

Overall, ZIP code 57544 reflects a community defined by high homeownership and a significant Social Security-dependent population.

451

population

252.04

sq mi land

Standard

ZIP type

Central (CT)

timezone

57544 ZIP code map

Cities in ZIP code 57544

Below are the cities the US Postal Service accepts for ZIP code 57544. Using any city not on this list may result in mail delivery delays.

City	Status
Kennebec	Acceptable
Kennebec	Preferred

Nearby ZIP codes

57568 Presho (13 mi) 57569 Reliance (13.4 mi) 57548 Lower Brule (15.2 mi) 57534 Hamill (17.3 mi) 57541 Ideal (18.9 mi)

Demographics updated 05/2026

Population
Total population	451
Population density	2 / sq mi
State FIPS	46
County FIPS	085

Geography
Land area	252.04 sq mi
Water area	2.20 sq mi
Latitude	43.8632
Longitude	-99.8258
Timezone	Central (CT)
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	26.6%	43.2%	41.7%
$50k – $100k	50.2%	40.1%	33.8%
$100k – $200k	20.2%	14.7%	20.1%
Over $200k	3.0%	2.0%	4.4%

Demographics & statistics

451

Population

People per sq mi

34.7

Median age

$71,389

Median household income

$39,865

Per capita income

$131,400

Median home value

$860

Median monthly rent

84.1%

Home ownership

6.7%

Poverty rate

2.5%

Unemployment

184

Housing units

23.2%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

25–34

35–44

45–54

55–59

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	123	27.3%
18 and over	328	72.7%
65 and over	105	23.3%
Median age	34.7 years

Race & ethnicity

White 86.5%

American Indian / Alaska Native 12.2%

Two or more races 1.3%

Group	Count	%
White	390	86.5%
American Indian / Alaska Native	55	12.2%
Two or more races	6	1.3%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	26.6%	43.2%	41.7%
$50k – $100k	50.2%	40.1%	33.8%
$100k – $200k	20.2%	14.7%	20.1%
Over $200k	3.0%	2.0%	4.4%

Under $10k 1.1%

$10k–$15k 2.8%

$15k–$25k 2.8%

$25k–$35k 5.7%

$35k–$50k 9.1%

$50k–$75k 30.7%

$75k–$100k 18.2%

$100k–$150k 22.2%

$200k+ 7.4%

Range	% of households
Under $10k	1.1%
$10k–$15k	2.8%
$15k–$25k	2.8%
$25k–$35k	5.7%
$35k–$50k	9.1%
$50k–$75k	30.7%
$75k–$100k	18.2%
$100k–$150k	22.2%
$200k+	7.4%
Median income	$71,389

Housing

Home values

Under $50k 18.9%

$50k–$100k 16.9%

$100k–$150k 31.8%

$150k–$200k 6.8%

$200k–$300k 7.4%

$300k–$500k 9.5%

$500k–$1M 8.8%

Housing overview

Metric	Value
Median home value	$131,400
Median rent / month	$860
Owner occupied	84.1%
Renter occupied	15.9%
Vacant	17.0%
Single-family detached	96.2%
Large apartment buildings	0.0%
Mobile homes	1.4%
Median rooms	6.1
Avg household size (owned)	2.64

Year built

Era	%
2020 or later	0.0%
2010–2019	3.8%
2000–2009	3.8%
1990–1999	9.9%
1980–1989	4.2%
1970–1979	5.2%
1960–1969	22.2%
1950–1959	13.2%
1940–1949	2.4%
1939 or earlier	35.4%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	5.2%
2 bedrooms	22.2%
3 bedrooms	43.9%
4 bedrooms	12.7%
5+ bedrooms	16.0%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	15.3%
2 vehicles	42.0%
3 or more	42.6%

Heating fuel

Fuel type	%
Utility gas	3.4%
Electricity	56.8%
Propane / LP gas	31.8%
Fuel oil	8.0%

Households & families

Household type	Count	%
Married-couple family	99	56.3%
Cohabiting couple	9	5.1%
Male householder, no spouse	41	23.3%
Female householder, no spouse	27	15.3%
Households with children under 18	39	22.2%
Households with seniors (65+)	71	40.3%
Average household size	2.56

Marital status

Status	Male	Female
Never married	23.2%	16.7%
Married	60.5%	61.3%
Separated	2.2%	0.0%
Widowed	3.8%	13.3%
Divorced	10.3%	8.7%

Education

Less than 9th grade 0.0%

Some HS, no diploma 9.5%

HS graduate 49.3%

Some college, no degree 11.1%

Associate's degree 6.9%

Bachelor's degree 21.2%

Graduate / professional 2.0%

Metric	%
HS diploma or higher	90.5%
Bachelor's or higher	23.2%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	17	17.0%
Kindergarten	0	0.0%
Elementary school	72	72.0%
High school	8	8.0%
College / grad school	3	3.0%

Employment

Industry of employment

Education & healthcare 20.3%

Agriculture & mining 19.8%

Information 10.4%

Construction 9.9%

Transportation & utilities 9.9%

Retail trade 8.9%

Public administration 8.3%

Wholesale trade 6.3%

Arts, food & hospitality 5.2%

Other services 1.0%

Occupation

Category	%
Management, business & arts	28.1%
Service	12.5%
Sales & office	27.1%
Natural resources & construction	21.4%
Production & transportation	10.9%

Employment type

Type	%
Private sector	54.7%
Government	22.4%
Self-employed	22.9%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	73.0%
Carpool	2.2%
Public transit	0.0%
Walk	7.6%
Work from home	17.3%
Other means	0.0%
Avg commute (minutes)	8.4

Poverty

All people 6.7%

Under 18 years 14.6%

18 and over 3.7%

Married-couple families 0.0%

Female-led households 40.0%

Income support

Source	% of households
Social Security	47.7%
Retirement income	24.4%
Supplemental Security	5.1%
Cash public assistance	1.1%
Food stamps / SNAP	11.9%

Health indicators

Condition	%
Obesity	35.1%
High blood pressure	34.0%
High cholesterol	33.8%
Diabetes	11.0%
Heart disease	8.1%
Stroke	3.7%
Asthma	9.0%
Arthritis	26.5%
Kidney disease	3.4%
Pulmonary disease	7.0%
Cancer	8.1%

Behavior / access	%
Smoking	19.6%
Binge drinking	18.8%
No physical activity	23.8%
Less than 7 hrs sleep	28.1%
Depression	14.9%
Fair or poor health	13.4%
Poor mental health	10.5%
Poor physical health	9.9%
No health insurance	12.1%
Visited doctor (checkup)	76.4%
Visited dentist	65.9%
Cholesterol screening	89.8%
Teeth loss	14.6%

Veterans & disability

Veterans	Count	%
Civilian veterans	20	6.1%

Disability	%
Any disability	15.5%
Under 18	0.0%
18–64 years	20.6%
65 and over	22.9%

Health insurance coverage

Type	%
Private insurance	66.1%
Public insurance	34.1%
No insurance	6.0%
Uninsured under 19	5.7%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	423	93.8%
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)	451	100.0%
Born in same state	444	98.4%
Born in different state	344	76.3%
Foreign born	7	1.6%
Naturalized citizen	0	0.0%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
Arab	110	24.4%
Italian	67	14.9%
Polish	50	11.1%

Ancestry	Count	%
French	25	5.5%
English	18	4%
Dutch	10	2.2%

Technology access

Metric	% of households
Computer access	39.0%
Internet access	97.2%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 57544

What city is ZIP code 57544 in?

ZIP code 57544 is primarily assigned to Kennebec, South Dakota.

What county is ZIP code 57544 in?

ZIP code 57544 falls within Lyman County, South Dakota.

Does ZIP code 57544 have a large retiree population?

48% of households in ZIP code 57544 receive Social Security income, suggesting a significant retiree or disability population.

Is ZIP code 57544 mostly owner-occupied?

84% of occupied units in ZIP code 57544 are owner-occupied, well above the national average.

What is the typical home value in ZIP code 57544?

The median home value in ZIP code 57544 is $131,400.

What is the population of ZIP code 57544?

ZIP code 57544 has an estimated population of 451 residents, with a density of 2 people per square mile.

What timezone is ZIP code 57544 in?

ZIP code 57544 observes the CST timezone.