Twin Brooks ZIP Codes — Grant County, SD

There is one unique ZIP code in Twin Brooks, South Dakota and it is 57269. Area code: 605.
1
ZIP codes
94.05
sq mi land
0.02
sq mi water
605
area code
Twin Brooks, SD ZIP code map

About Twin Brooks, SD

Twin Brooks is a quaint town located in the state of South Dakota. Nestled within Grant County, this small community is known for its picturesque landscapes and friendly atmosphere. Despite its size, Twin Brooks embodies the charm of rural America, making it a pleasant place for residents and visitors alike.

Location & geography

Twin Brooks covers a total land area of 94.05 square miles, with a minimal water area of 0.02 square miles. The town is situated near several other small communities, with the nearest cities being Milbank approximately 12 miles to the southeast, Wilmot about 12 miles to the north, and Ortley 7 miles to the west. The terrain surrounding Twin Brooks consists primarily of rolling plains, characteristic of the South Dakota landscape.

Community & economy

The character of Twin Brooks is defined by its close-knit community, where residents take pride in their hometown spirit. The local economy is primarily supported by agriculture, which plays a significant role in the day-to-day lives of its citizens. Community events and gatherings foster a sense of unity and encourage engagement among residents.

Transportation

Twin Brooks is accessible by local highways, with South Dakota Highway 15 running north to south, providing connectivity to neighboring towns. The nearest significant airport is Grant County Airport, located in Milbank, which facilitates regional travel opportunities. Public transportation options are limited, but the town's layout encourages residents to engage in local activities and services within their community.

History

Twin Brooks was established in the late 19th century and has since maintained its agricultural roots, contributing to South Dakota's storied farming culture. The town has experienced various developments over the years, including the establishment of essential services and amenities that support its residents. Key events in the town's history are closely tied to the broader growth of Grant County, as it evolved to meet the needs of its population.

Did you know?

One little-known fact about Twin Brooks is that it is one of the few towns in South Dakota that boasts a unique blend of agricultural tradition and community involvement. Additionally, the town's small size fosters a charming atmosphere, where everyone knows their neighbors and community spirit thrives.

ZIP codes for Twin Brooks, SD (1)
ZIP code City County Map
57269 Twin Brooks Grant View map

Demographics & statistics

179
Population
54.3
Median age
$80,750
Median household income
$72,283
Per capita income
$241,700
Median home value
$0
Median monthly rent
97.3%
Home ownership
10.1%
Poverty rate
0.0%
Unemployment
77
Housing units
27.5%
Bachelor's or higher

Age distribution

Male Female
3
Under 5
3
1
10–14
1
11
15–19
11
7
25–34
7
7
35–44
7
16
45–54
17
9
55–59
10
11
60–64
11
19
65–74
19
4
75–84
5
← Male
Female →

Age summary

GroupCount%
Under 182715.1%
18 and over15284.9%
65 and over4726.3%
Median age54.3 years

Race & ethnicity

White 98.9%
Hispanic or Latino 0.6%
Two or more races 0.6%
GroupCount%
White17898.9%
Hispanic or Latino10.6%
Two or more races10.6%

Household income

Under $10k 4.0%
$10k–$15k 1.3%
$15k–$25k 4.0%
$25k–$35k 2.7%
$35k–$50k 6.7%
$50k–$75k 13.3%
$75k–$100k 25.3%
$100k–$150k 18.7%
$200k+ 24.0%
Range% of households
Under $10k4.0%
$10k–$15k1.3%
$15k–$25k4.0%
$25k–$35k2.7%
$35k–$50k6.7%
$50k–$75k13.3%
$75k–$100k25.3%
$100k–$150k18.7%
$200k+24.0%
Median income$80,750

Housing

Home values

Under $50k 16.4%
$50k–$100k 8.2%
$100k–$150k 4.1%
$150k–$200k 4.1%
$200k–$300k 31.5%
$300k–$500k 23.3%
$500k–$1M 2.7%
$1M+ 9.6%

Housing overview

MetricValue
Median home value$241,700
Median rent / month$0
Owner occupied97.3%
Renter occupied2.7%
Vacant5.1%
Single-family detached88.6%
Large apartment buildings0.0%
Mobile homes7.6%
Median rooms7.9
Avg household size (owned)2.37

Year built

Era%
2020 or later0.0%
2010–20198.9%
2000–200924.1%
1990–19996.3%
1980–19897.6%
1970–197911.4%
1960–19695.1%
1950–19593.8%
1940–19496.3%
1939 or earlier26.6%

Bedrooms

Size% of units
No bedroom (studio)0.0%
1 bedroom1.3%
2 bedrooms19.0%
3 bedrooms26.6%
4 bedrooms36.7%
5+ bedrooms16.5%

Vehicles per household

Vehicles% of households
No vehicle0.0%
1 vehicle20.0%
2 vehicles28.0%
3 or more52.0%

Heating fuel

Fuel type%
Utility gas4.0%
Electricity36.0%
Propane / LP gas49.3%
Fuel oil4.0%
Wood6.7%

Households & families

Household typeCount%
Married-couple family6282.7%
Cohabiting couple11.3%
Male householder, no spouse810.7%
Female householder, no spouse45.3%
Households with children under 182229.3%
Households with seniors (65+)3141.3%
Average household size2.39

Marital status

StatusMaleFemale
Never married8.4%38.6%
Married83.1%60.2%
Separated0.0%0.0%
Widowed1.2%0.0%
Divorced7.2%1.1%

Education

Less than 9th grade 16.1%
Some HS, no diploma 1.3%
HS graduate 35.6%
Some college, no degree 14.1%
Associate's degree 5.4%
Bachelor's degree 24.8%
Graduate / professional 2.7%
Metric%
HS diploma or higher82.6%
Bachelor's or higher27.5%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool00.0%
Kindergarten00.0%
Elementary school00.0%
High school2482.8%
College / grad school517.2%

Employment

Industry of employment

Agriculture & mining 29.7%
Manufacturing 21.2%
Education & healthcare 11.9%
Finance & real estate 7.6%
Other services 7.6%
Arts, food & hospitality 6.8%
Retail trade 5.1%
Public administration 3.4%
Wholesale trade 2.5%
Professional & management 2.5%
Construction 1.7%

Occupation

Category%
Management, business & arts41.5%
Service25.4%
Sales & office11.9%
Natural resources & construction6.8%
Production & transportation14.4%

Employment type

Type%
Private sector72.0%
Government5.9%
Self-employed22.0%
Unpaid family workers0.0%

Commute

Method%
Drive alone89.0%
Carpool2.5%
Public transit0.0%
Walk0.0%
Other means0.0%
Avg commute (minutes)17.2

Poverty

All people 10.1%
Under 18 years 22.2%
18 and over 7.9%
Married-couple families 8.1%
Female-led households 0.0%

Income support

Source% of households
Social Security32.0%
Retirement income45.3%
Supplemental Security0.0%
Cash public assistance2.7%
Food stamps / SNAP2.7%

Health indicators

Condition%
High blood pressure30.5%
High cholesterol30.5%
Heart disease6.8%
Stroke2.9%
Asthma8.7%
Arthritis24.1%
Kidney disease2.8%
Pulmonary disease5.9%
Cancer7.0%
Behavior / access%
Binge drinking20.4%
No physical activity24.2%
Less than 7 hrs sleep28.1%
Fair or poor health10.9%
Poor mental health10.6%
Poor physical health8.7%
No health insurance12.2%
Visited doctor (checkup)74.8%
Visited dentist68.2%
Cholesterol screening88.9%
Teeth loss13.8%

Veterans & disability

VeteransCount%
Civilian veterans2214.5%
Disability%
Any disability12.3%
Under 1822.2%
18–64 years3.8%
65 and over25.5%

Health insurance coverage

Type%
Private insurance72.1%
Public insurance29.6%
Uninsured under 190.0%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only17396.6%
Spanish00.0%
Other Indo-European00.0%
Asian & Pacific Islander00.0%
Other languages00.0%

Place of birth & citizenship

OriginCount%
Native born (US)179100.0%
Born in same state179100.0%
Born in different state13776.5%
Foreign born00.0%
Naturalized citizen00.0%
Not a US citizen00.0%

Ancestry

AncestryCount%
Polish4625.7%
Italian1910.6%
Dutch84.5%
AncestryCount%
French52.8%
English31.7%
Arab21.1%

Technology access

Metric% of households
Computer access41.9%
Internet access78.7%

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

Frequently asked questions
What ZIP codes does Twin Brooks, SD have?
Twin Brooks, SD has one ZIP code: 57269. Each ZIP code serves a distinct delivery area within the city and surrounding region.
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