57038 ZIP Code — Jefferson, SD

Union County, South Dakota

ZIP code 57038 is located in Jefferson, South Dakota, within Union County. It covers approximately 50.58 square miles and serves a population of 1,577 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 605.

About ZIP code 57038

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 $286,100. Owner-occupancy is high at 92%, well above the national average.

The gap between median ($84,083) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 3% is below the national average.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 22 minutes is near the national average.

Educational attainment is near the national average, with 34% of residents holding a bachelor's degree or higher.

1,577

population

50.58

sq mi land

Standard

ZIP type

Central (CT)

timezone

57038 ZIP code map

Cities in ZIP code 57038

Below are the cities the US Postal Service accepts for ZIP code 57038. Using any city not on this list may result in mail delivery delays.

City	Status
Jefferson	Preferred

Nearby ZIP codes

51109 Sioux City (6.1 mi) 57049 North Sioux City (6.2 mi) 68743 Jackson (7.9 mi) 68770 Ponca (8.1 mi) 51103 Sioux City (8.9 mi) 68776 South Sioux City (9.8 mi) 51062 Westfield (10 mi) 51104 Sioux City (10.4 mi) 68785 Waterbury (11.3 mi) 51101 Sioux City (11.7 mi) 57025 Elk Point (12 mi) 51105 Sioux City (12.4 mi)

Demographics updated 05/2026

Population
Total population	1,577
Population density	31 / sq mi
State FIPS	46
County FIPS	127

Geography
Land area	50.58 sq mi
Water area	2.53 sq mi
Latitude	42.5769
Longitude	-96.5986
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	25.5%	33.6%	41.7%
$50k – $100k	21.3%	29.9%	33.8%
$100k – $200k	39.4%	26.8%	20.1%
Over $200k	13.8%	9.7%	4.4%

Demographics & statistics

1,577

Population

People per sq mi

43.8

Median age

$84,083

Median household income

$50,333

Per capita income

$286,100

Median home value

$613

Median monthly rent

91.5%

Home ownership

3.2%

Poverty rate

7.4%

Unemployment

646

Housing units

33.5%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

25–34

132

35–44

139

45–54

148

55–59

60–64

105

65–74

112

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	386	24.5%
18 and over	1,191	75.5%
65 and over	277	17.6%
Median age	43.8 years

Race & ethnicity

White 94.3%

Hispanic or Latino 2.1%

American Indian / Alaska Native 1.4%

Two or more races 1.2%

Other race 0.9%

Group	Count	%
White	1,519	94.3%
Hispanic or Latino	34	2.1%
American Indian / Alaska Native	23	1.4%
Two or more races	20	1.2%
Other race	15	0.9%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	25.5%	33.6%	41.7%
$50k – $100k	21.3%	29.9%	33.8%
$100k – $200k	39.4%	26.8%	20.1%
Over $200k	13.8%	9.7%	4.4%

Under $10k 1.9%

$10k–$15k 0.4%

$15k–$25k 4.9%

$25k–$35k 0.3%

$35k–$50k 14.7%

$50k–$75k 20.5%

$75k–$100k 12.7%

$100k–$150k 9.2%

$150k–$200k 10.1%

$200k+ 25.3%

Range	% of households
Under $10k	1.9%
$10k–$15k	0.4%
$15k–$25k	4.9%
$25k–$35k	0.3%
$35k–$50k	14.7%
$50k–$75k	20.5%
$75k–$100k	12.7%
$100k–$150k	9.2%
$150k–$200k	10.1%
$200k+	25.3%
Median income	$84,083

Housing

Home values

Under $50k 1.4%

$50k–$100k 3.3%

$100k–$150k 16.4%

$150k–$200k 18.3%

$200k–$300k 11.4%

$300k–$500k 41.0%

$500k–$1M 8.2%

Housing overview

Metric	Value
Median home value	$286,100
Median rent / month	$613
Owner occupied	91.5%
Renter occupied	8.5%
Vacant	1.7%
Single-family detached	94.0%
Large apartment buildings	0.0%
Mobile homes	1.6%
Median rooms	7.7
Avg household size (owned)	2.24

Year built

Era	%
2020 or later	0.4%
2010–2019	5.7%
2000–2009	15.9%
1990–1999	15.2%
1980–1989	6.4%
1970–1979	33.8%
1960–1969	1.0%
1950–1959	5.2%
1940–1949	1.1%
1939 or earlier	15.3%

Bedrooms

Size	% of units
No bedroom (studio)	0.3%
1 bedroom	0.3%
2 bedrooms	15.9%
3 bedrooms	41.7%
4 bedrooms	32.2%
5+ bedrooms	9.6%

Vehicles per household

Vehicles	% of households
No vehicle	2.9%
1 vehicle	8.9%
2 vehicles	29.7%
3 or more	58.4%

Heating fuel

Fuel type	%
Utility gas	24.7%
Electricity	53.4%
Propane / LP gas	12.6%
Wood	0.3%

Households & families

Household type	Count	%
Married-couple family	412	59.5%
Cohabiting couple	73	10.5%
Male householder, no spouse	137	19.8%
Female householder, no spouse	71	10.2%
Households with children under 18	156	22.5%
Households with seniors (65+)	197	28.4%
Average household size	2.28

Marital status

Status	Male	Female
Never married	21.6%	9.2%
Married	54.1%	71.9%
Separated	3.4%	0.8%
Widowed	0.3%	7.2%
Divorced	20.7%	10.9%

Education

Less than 9th grade 5.7%

Some HS, no diploma 1.3%

HS graduate 28.7%

Some college, no degree 13.6%

Associate's degree 17.2%

Bachelor's degree 17.9%

Graduate / professional 15.6%

Metric	%
HS diploma or higher	93.0%
Bachelor's or higher	33.5%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	23	5.7%
Kindergarten	6	1.5%
Elementary school	278	68.5%
High school	88	21.7%
College / grad school	11	2.7%

Employment

Industry of employment

Education & healthcare 20.8%

Manufacturing 18.0%

Finance & real estate 17.3%

Construction 13.3%

Agriculture & mining 12.5%

Wholesale trade 4.1%

Retail trade 3.8%

Arts, food & hospitality 3.6%

Other services 2.2%

Public administration 1.4%

Transportation & utilities 1.2%

Professional & management 1.0%

Information 0.6%

Occupation

Category	%
Management, business & arts	45.4%
Service	8.0%
Sales & office	28.6%
Natural resources & construction	5.3%
Production & transportation	12.7%

Employment type

Type	%
Private sector	79.0%
Government	6.0%
Self-employed	15.0%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	79.6%
Carpool	2.2%
Public transit	0.0%
Walk	0.0%
Work from home	13.1%
Other means	5.1%
Avg commute (minutes)	21.8

Poverty

All people 3.2%

Under 18 years 6.9%

18 and over 2.2%

Married-couple families 0.7%

Female-led households 43.8%

Income support

Source	% of households
Social Security	23.5%
Retirement income	20.2%
Supplemental Security	2.5%
Cash public assistance	0.6%
Food stamps / SNAP	4.3%

Health indicators

Condition	%
Obesity	38.0%
High blood pressure	28.2%
High cholesterol	29.9%
Diabetes	8.0%
Heart disease	5.7%
Stroke	2.5%
Asthma	8.5%
Arthritis	22.5%
Kidney disease	2.5%
Pulmonary disease	5.0%
Cancer	6.5%

Behavior / access	%
Smoking	16.2%
Binge drinking	22.0%
No physical activity	20.0%
Less than 7 hrs sleep	28.5%
Depression	15.4%
Fair or poor health	9.6%
Poor mental health	10.3%
Poor physical health	7.8%
No health insurance	10.1%
Visited doctor (checkup)	74.7%
Visited dentist	71.1%
Cholesterol screening	89.6%
Teeth loss	11.4%

Veterans & disability

Veterans	Count	%
Civilian veterans	75	6.3%

Disability	%
Any disability	12.9%
Under 18	18.4%
18–64 years	10.5%
65 and over	13.4%

Health insurance coverage

Type	%
Private insurance	83.0%
Public insurance	25.6%
No insurance	1.7%
Uninsured under 19	1.2%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	1,562	99.0%
Spanish	14	0.9%
Other Indo-European	14	0.9%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	1,561	99.0%
Born in same state	1,561	99.0%
Born in different state	172	10.9%
Foreign born	0	0.0%
Naturalized citizen	16	1.0%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
French	142	9%
Dutch	128	8.1%
Italian	122	7.7%
Arab	93	5.9%

Ancestry	Count	%
German	45	2.9%
Polish	42	2.7%
English	11	0.7%

Technology access

Metric	% of households
Computer access	43.9%
Internet access	96.0%

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

Frequently asked questions about ZIP code 57038

What city is ZIP code 57038 in?

ZIP code 57038 is primarily assigned to Jefferson, South Dakota.

What county is ZIP code 57038 in?

ZIP code 57038 falls within Union County, South Dakota.

Is ZIP code 57038 mostly owner-occupied?

92% of occupied units in ZIP code 57038 are owner-occupied, well above the national average.

What is the population of ZIP code 57038?

ZIP code 57038 has an estimated population of 1,577 residents, with a density of 31 people per square mile.

What is the typical home value in ZIP code 57038?

The median home value in ZIP code 57038 is $286,100.

What is the median household income in ZIP code 57038?

The median household income in ZIP code 57038 is $84,083, above the national median of ~$75,000.

What timezone is ZIP code 57038 in?

ZIP code 57038 observes the CST timezone.