Union Center ZIP Codes — Meade County, SD

There is one unique ZIP code in Union Center, South Dakota and it is 57787. Area code: 605.

ZIP codes

627.24

sq mi land

0.98

sq mi water

605

area code

Union Center, SD ZIP code map

About Union Center, SD

Union Center is a small, unincorporated community located in Meade County, South Dakota. Known for its serene rural landscape, it provides a tranquil lifestyle amidst the vast plains. With its unique charm, Union Center embodies the spirit of small-town America.

Location & geography

Union Center is situated approximately 30 miles southwest of Rapid City, making it accessible to the amenities of this larger city. The community covers a significant land area of 627.24 square miles, with a small water area of 0.98 square miles. Its terrain primarily consists of rolling hills and grassy fields, characteristic of southwestern South Dakota.

Community & economy

The character of Union Center is shaped by its close-knit community and strong agricultural presence. Local industries primarily revolve around farming and ranching, which are integral to the livelihood of residents. Daily life here is typically quiet, with community gatherings and events bringing residents together throughout the year.

Transportation

U.S. Highway 34 is the main roadway that provides access to Union Center, connecting it with nearby towns and cities. The nearest major airport is Rapid City Regional Airport, located roughly 35 miles to the north, offering regional connectivity. Public transit options are minimal due to the rural nature of the area.

History

Union Center was founded in the late 19th century, during a time when settlers were establishing farms in the region. Key industries during its early development centered on agriculture, which continues to play a vital role today. Notable events, such as local fairs and rodeos, have strengthened the community’s ties over the years.

Did you know?

One surprising fact about Union Center is that it is part of the larger Black Hills region, which is known for its stunning natural beauty and rich history. Despite its small size, the area has a strong sense of pride and community among its residents.

ZIP codes for Union Center, SD (1)

ZIP code	City	County	Map
57787	Union Center	Meade	View map

Demographics & statistics

677

Population

33.7

Median age

$56,422

Median household income

$18,992

Per capita income

Median home value

$852

Median monthly rent

71.7%

Home ownership

27.3%

Poverty rate

0.0%

Unemployment

152

Housing units

46.1%

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

← Male

Female →

Age summary

Group	Count	%
Under 18	214	31.6%
18 and over	463	68.4%
65 and over	21	3.1%
Median age	33.7 years

Race & ethnicity

White 77.7%

Hispanic or Latino 11.2%

Two or more races 11.2%

Group	Count	%
White	592	77.7%
Hispanic or Latino	85	11.2%
Two or more races	85	11.2%

Household income

$15k–$25k 17.1%

$35k–$50k 24.1%

$50k–$75k 21.4%

$75k–$100k 28.3%

$100k–$150k 4.3%

$150k–$200k 4.8%

Range	% of households
$15k–$25k	17.1%
$35k–$50k	24.1%
$50k–$75k	21.4%
$75k–$100k	28.3%
$100k–$150k	4.3%
$150k–$200k	4.8%
Median income	$56,422

Housing

Home values

Under $50k 22.4%

$50k–$100k 26.1%

$100k–$150k 16.4%

$200k–$300k 23.9%

$300k–$500k 11.2%

Housing overview

Metric	Value
Median home value	$0
Median rent / month	$852
Owner occupied	71.7%
Renter occupied	28.3%
Vacant	8.8%
Single-family detached	80.5%
Large apartment buildings	0.0%
Mobile homes	19.5%
Median rooms	5.7
Avg household size (owned)	3.66

Year built

Era	%
2020 or later	0.0%
2010–2019	15.6%
2000–2009	0.0%
1990–1999	19.0%
1980–1989	8.3%
1970–1979	0.0%
1960–1969	18.5%
1950–1959	31.2%
1940–1949	1.0%
1939 or earlier	6.3%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	8.8%
2 bedrooms	31.2%
3 bedrooms	47.8%
4 bedrooms	8.8%
5+ bedrooms	3.4%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	2.7%
2 vehicles	28.9%
3 or more	68.4%

Heating fuel

Fuel type	%
Propane / LP gas	88.2%
Wood	11.8%

Households & families

Household type	Count	%
Married-couple family	172	92.0%
Cohabiting couple	0	0.0%
Male householder, no spouse	5	2.7%
Female householder, no spouse	10	5.3%
Households with children under 18	118	63.1%
Households with seniors (65+)	12	6.4%
Average household size	3.62

Marital status

Status	Male	Female
Never married	22.7%	9.3%
Married	77.3%	86.3%
Separated	0.0%	0.0%
Widowed	0.0%	4.4%
Divorced	0.0%	0.0%

Education

Less than 9th grade 0.0%

Some HS, no diploma 4.1%

HS graduate 34.9%

Some college, no degree 4.4%

Associate's degree 10.5%

Bachelor's degree 46.1%

Graduate / professional 0.0%

Metric	%
HS diploma or higher	95.9%
Bachelor's or higher	46.1%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	0	0.0%
Elementary school	154	70.6%
High school	64	29.4%
College / grad school	0	0.0%

Employment

Industry of employment

Agriculture & mining 53.7%

Education & healthcare 17.0%

Transportation & utilities 14.9%

Retail trade 5.6%

Other services 4.8%

Arts, food & hospitality 2.3%

Manufacturing 1.8%

Occupation

Category	%
Management, business & arts	71.4%
Service	2.3%
Sales & office	12.9%
Natural resources & construction	0.0%
Production & transportation	13.4%

Employment type

Type	%
Private sector	39.7%
Government	17.5%
Self-employed	42.8%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	39.7%
Carpool	6.3%
Public transit	0.0%
Walk	5.6%
Other means	0.0%
Avg commute (minutes)	17.9

Poverty

All people 27.3%

Under 18 years 49.1%

18 and over 17.3%

Married-couple families 18.6%

Female-led households 0.0%

Income support

Source	% of households
Social Security	6.4%
Retirement income	6.4%
Supplemental Security	0.0%
Cash public assistance	0.0%
Food stamps / SNAP	0.0%

Health indicators

Condition	%
High blood pressure	32.9%
High cholesterol	29.4%
Heart disease	7.4%
Stroke	3.2%
Asthma	8.6%
Arthritis	25.8%
Kidney disease	3.0%
Pulmonary disease	6.2%
Cancer	7.3%

Behavior / access	%
Binge drinking	18.2%
No physical activity	22.5%
Less than 7 hrs sleep	30.5%
Fair or poor health	11.3%
Poor mental health	10.6%
Poor physical health	9.0%
No health insurance	11.5%
Visited doctor (checkup)	73.7%
Visited dentist	63.0%
Cholesterol screening	89.5%
Teeth loss	14.4%

Veterans & disability

Veterans	Count	%
Civilian veterans	0	0.0%

Disability	%
Any disability	0.3%
Under 18	0.0%
18–64 years	0.0%
65 and over	9.5%

Health insurance coverage

Type	%
Private insurance	88.0%
Public insurance	3.1%
Uninsured under 19	13.5%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	650	96.0%
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)	677	100.0%
Born in same state	677	100.0%
Born in different state	549	81.1%
Foreign born	0	0.0%
Naturalized citizen	0	0.0%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
Polish	155	22.9%
Italian	145	21.4%
French	57	8.4%

Ancestry	Count	%
English	55	8.1%
Arab	32	4.7%

Technology access

Metric	% of households
Computer access	27.6%
Internet access	100.0%

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

Frequently asked questions

What ZIP codes does Union Center, SD have?

Union Center, SD has one ZIP code: 57787. Each ZIP code serves a distinct delivery area within the city and surrounding region.