Oldham ZIP Codes — Kingsbury County, SD

There is one unique ZIP code in Oldham, South Dakota and it is 57051. Area code: 605.

ZIP codes

78.84

sq mi land

0.00

sq mi water

605

area code

Oldham, SD ZIP code map

About Oldham, SD

Oldham, South Dakota, is a small and quaint community located in Kingsbury County. With its scenic landscapes and close-knit atmosphere, Oldham offers a peaceful retreat reminiscent of classic Midwestern town life. Residents and visitors alike appreciate the rich history and friendly demeanor of the local populace.

Location & geography

Nestled in the eastern part of South Dakota, Oldham is surrounded by the natural beauty of rolling hills and farmland. It is conveniently located near several cities, including De Smet, which is about 12 miles to the west, and Lake Preston, approximately 9 miles to the east. The city spans a land area of 78.84 square miles and boasts no significant water area.

Community & economy

The character of Oldham is defined by its welcoming community spirit and commitment to preserving its local heritage. The town primarily thrives on agriculture and related industries, which shape daily life and economic activities. Local events, such as community gatherings and seasonal festivals, foster a sense of belonging among residents.

Transportation

Oldham is accessible via South Dakota Highway 25, which connects the town to nearby cities and highways. The nearest regional airport is Watertown Regional Airport, located about 40 miles to the northeast, providing additional travel opportunities for residents. Public transportation options are limited, making private vehicles the primary mode of transit.

History

Oldham was founded in the late 19th century and has deep roots in agricultural development. The town has historically been part of the farming community landscape in Kingsbury County, evolving alongside advancements in agricultural technology. Key events have shaped its history, including the establishment of local schools and churches that served as community hubs.

Did you know?

A little-known fact about Oldham is its unique sense of community, which is evident in its strong support for local events and initiatives. Despite its small size, the town has a rich history that reflects the broader narrative of rural life in South Dakota.

ZIP codes for Oldham, SD (1)

ZIP code	City	County	Map
57051	Oldham	Kingsbury	View map

Demographics & statistics

226

Population

51.5

Median age

$40,833

Median household income

$54,339

Per capita income

$77,700

Median home value

Median monthly rent

87.9%

Home ownership

7.1%

Poverty rate

0.0%

Unemployment

141

Housing units

21.5%

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	25	11.1%
18 and over	201	88.9%
65 and over	64	28.3%
Median age	51.5 years

Race & ethnicity

White 95.1%

Two or more races 4.9%

Group	Count	%
White	215	95.1%
Two or more races	11	4.9%

Household income

Under $10k 4.8%

$10k–$15k 4.8%

$15k–$25k 11.3%

$25k–$35k 25.0%

$35k–$50k 8.1%

$50k–$75k 20.2%

$75k–$100k 8.1%

$100k–$150k 8.9%

$200k+ 8.9%

Range	% of households
Under $10k	4.8%
$10k–$15k	4.8%
$15k–$25k	11.3%
$25k–$35k	25.0%
$35k–$50k	8.1%
$50k–$75k	20.2%
$75k–$100k	8.1%
$100k–$150k	8.9%
$200k+	8.9%
Median income	$40,833

Housing

Home values

Under $50k 25.7%

$50k–$100k 31.2%

$100k–$150k 10.1%

$150k–$200k 9.2%

$200k–$300k 8.3%

$300k–$500k 12.8%

$500k–$1M 2.8%

Housing overview

Metric	Value
Median home value	$77,700
Median rent / month	$0
Owner occupied	87.9%
Renter occupied	12.1%
Vacant	20.5%
Single-family detached	95.5%
Large apartment buildings	0.0%
Mobile homes	1.3%
Median rooms	6.7
Avg household size (owned)	1.82

Year built

Era	%
2020 or later	0.0%
2010–2019	1.3%
2000–2009	4.5%
1990–1999	1.3%
1980–1989	4.5%
1970–1979	2.6%
1960–1969	6.4%
1950–1959	5.1%
1940–1949	3.8%
1939 or earlier	70.5%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	11.5%
2 bedrooms	17.9%
3 bedrooms	45.5%
4 bedrooms	16.7%
5+ bedrooms	8.3%

Vehicles per household

Vehicles	% of households
No vehicle	6.5%
1 vehicle	27.4%
2 vehicles	34.7%
3 or more	31.5%

Heating fuel

Fuel type	%
Utility gas	46.8%
Electricity	32.3%
Propane / LP gas	12.1%
Fuel oil	1.6%
Wood	6.5%

Households & families

Household type	Count	%
Married-couple family	39	31.5%
Cohabiting couple	7	5.6%
Male householder, no spouse	45	36.3%
Female householder, no spouse	33	26.6%
Households with children under 18	11	8.9%
Households with seniors (65+)	44	35.5%
Average household size	1.82

Marital status

Status	Male	Female
Never married	53.8%	22.6%
Married	32.5%	42.9%
Separated	2.6%	0.0%
Widowed	2.6%	17.9%
Divorced	8.5%	16.7%

Education

Less than 9th grade 0.6%

Some HS, no diploma 0.0%

HS graduate 40.5%

Some college, no degree 19.6%

Associate's degree 17.7%

Bachelor's degree 10.8%

Graduate / professional 10.8%

Metric	%
HS diploma or higher	99.4%
Bachelor's or higher	21.5%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	2	8.0%
Kindergarten	0	0.0%
Elementary school	10	40.0%
High school	4	16.0%
College / grad school	9	36.0%

Employment

Industry of employment

Agriculture & mining 20.2%

Manufacturing 20.2%

Transportation & utilities 17.5%

Education & healthcare 15.8%

Other services 7.0%

Professional & management 6.1%

Wholesale trade 4.4%

Retail trade 2.6%

Public administration 2.6%

Finance & real estate 1.8%

Construction 0.9%

Arts, food & hospitality 0.9%

Occupation

Category	%
Management, business & arts	22.8%
Service	15.8%
Sales & office	19.3%
Natural resources & construction	6.1%
Production & transportation	36.0%

Employment type

Type	%
Private sector	70.2%
Government	14.9%
Self-employed	13.2%
Unpaid family workers	1.8%

Commute

Method	%
Drive alone	82.1%
Carpool	4.5%
Public transit	0.0%
Walk	0.9%
Other means	3.6%
Avg commute (minutes)	21.3

Poverty

All people 7.1%

Under 18 years 0.0%

18 and over 8.0%

Married-couple families 2.6%

Female-led households 0.0%

Income support

Source	% of households
Social Security	38.7%
Retirement income	26.6%
Supplemental Security	0.0%
Cash public assistance	0.0%
Food stamps / SNAP	3.2%

Health indicators

Condition	%
High blood pressure	34.8%
High cholesterol	33.9%
Heart disease	8.5%
Stroke	3.7%
Asthma	8.4%
Arthritis	27.1%
Kidney disease	3.4%
Pulmonary disease	6.6%
Cancer	8.9%

Behavior / access	%
Binge drinking	17.4%
No physical activity	24.6%
Less than 7 hrs sleep	26.0%
Fair or poor health	11.8%
Poor mental health	9.6%
Poor physical health	9.1%
No health insurance	11.3%
Visited doctor (checkup)	77.3%
Visited dentist	69.3%
Cholesterol screening	90.6%
Teeth loss	14.1%

Veterans & disability

Veterans	Count	%
Civilian veterans	20	10.0%

Disability	%
Any disability	15.5%
Under 18	0.0%
18–64 years	12.4%
65 and over	28.1%

Health insurance coverage

Type	%
Private insurance	70.8%
Public insurance	41.6%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	219	96.9%
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)	226	100.0%
Born in same state	226	100.0%
Born in different state	162	71.7%
Foreign born	0	0.0%
Naturalized citizen	0	0.0%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
Italian	57	25.2%
Polish	36	15.9%
Dutch	29	12.8%

Ancestry	Count	%
English	15	6.6%
Arab	8	3.5%
French	4	1.8%

Technology access

Metric	% of households
Computer access	54.9%
Internet access	87.9%

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

Frequently asked questions

What ZIP codes does Oldham, SD have?

Oldham, SD has one ZIP code: 57051. Each ZIP code serves a distinct delivery area within the city and surrounding region.