Zip code 57751: Keystone, South Dakota

Q: What city is zip code 57751?

57751 is assigned to Keystone, South Dakota. The city name is the one the Postal Service prefers for mail addressed to this zip code.

Q: What county is 57751 in?

57751 is mostly in Pennington County, but it extends into 1 other county.

Q: What is the population of 57751?

About 893 people live in 57751, according to the Census Bureau's American Community Survey.

Q: What is the median household income in 57751?

The median household income in 57751 is $97,969.

Q: What zip codes are near 57751?

The closest zip codes to 57751 are 57702, 57730, 57709, 57738, 57744.

Residential delivery areaPennington CountyMountain Time

Population

893

Median household income

$98K

U.S. $81K

Median home value

$474K

U.S. $333K

Median rent

$600/mo

U.S. $1,413

Median age

54.2

U.S. 38.9

Land area

44 sq mi

20 people/sq mi

Boundary is the Census Bureau's ZIP Code Tabulation Area, which closely tracks the postal delivery area.

About 57751

57751 is a rural zip code in Keystone, South Dakota (Pennington County), covering 44 sq mi of land. About 893 people live here, or 20 per square mile. The median resident is 54.2 years old, compared with 38.9 nationally.

The median household earns $97,969 a year, 21% above the national median of $80,734. 4.6% of residents live below the poverty line (U.S.: 12.5%). A typical home is valued at $473,500, or 4.8 years of median household income (U.S.: 4.1 years), which makes homes about as affordable as the national average for local earners. 86% of occupied homes are lived in by their owners, and renters pay a median of $600 a month.

43% of adults hold a bachelor's degree or higher (U.S.: 36%). Commuters average 34.2 minutes each way, and 7% of workers work from home. The most common jobs among working residents are in sales; education; and transportation and moving goods.

How 57751 compares

Sorted from highest to lowest national percentile

Median age54.2
98th
U.S. 38.9 · SD 3852nd of 347 in SD
Veterans16.6%
98th
U.S. 6.2% · SD 7.9%13th of 347 in SD
Housing vacancy31.4%
98th
U.S. 10.1% · SD 10.5%34th of 344 in SD
Homeownership rate85.6%
90th
StrengthU.S. 65.2% · SD 68.6%107th of 344 in SD
Average commute34.2 min
90th
WeaknessU.S. 26.4 min · SD 17.8 min13th of 330 in SD
Residents 65 and older23.4%
88th
U.S. 17.2% · SD 18%123rd of 347 in SD
Government workers20.6%
86th
U.S. 14.5% · SD 15.8%104th of 347 in SD
Uninsured rate12.5%
82nd
WeaknessU.S. 8.4% · SD 9%88th of 347 in SD
Self-employed workers12.7%
81st
U.S. 10% · SD 12.1%249th of 347 in SD
Median home value$473,500
72nd
U.S. $332,700 · SD $257,4005th of 302 in SD
Median household income$97,969
70th
U.S. $80,734 · SD $75,08145th of 327 in SD
Bachelor's degree or higher43%
70th
U.S. 35.7% · SD 31.9%23rd of 346 in SD
Broadband access93.6%
63rd
U.S. 91% · SD 89.6%67th of 344 in SD
Per capita income$43,414
59th
U.S. $44,673 · SD $40,550101st of 347 in SD
Median earnings per worker$50,526
57th
U.S. $49,666 · SD $46,53992nd of 345 in SD
Tech workers2.6%
45th
U.S. 3.8% · SD 2.3%49th of 347 in SD
Healthcare workers8.7%
38th
U.S. 9.7% · SD 10.5%141st of 347 in SD
Foreign-born residents6%
34th
U.S. 14.1% · SD 4%34th of 347 in SD
Residents under 1819.5%
28th
U.S. 22% · SD 24.2%259th of 347 in SD
Diversity index27.3
20th
U.S. 61.4 · SD 35.491st of 347 in SD
Work from home7.3%
18th
U.S. 15.1% · SD 9.7%230th of 347 in SD
Unemployment rate2.9%
15th
StrengthU.S. 5.2% · SD 2.9%106th of 347 in SD
Poverty rate4.6%
10th
StrengthU.S. 12.5% · SD 11.9%266th of 344 in SD
Population density20/sq mi
3rd
U.S. 95/sq mi · SD 12/sq mi65th of 347 in SD
Income inequality (Gini)0.352
3rd
StrengthU.S. 0.483 · SD 0.449264th of 343 in SD
Population893
1st
U.S. 334,922,499 · SD 907,428156th of 347 in SD
Median gross rent$600
1st
U.S. $1,413 · SD $946199th of 243 in SD
Rent-burdened renters15.9%
1st
StrengthU.S. 51.1% · SD 39.8%223rd of 313 in SD

Measure	57751	Pennington	SD	U.S.	National percentile	Rank in SD
Median age	54.2	40.1	38	38.9	98th	52nd of 347
Veterans	16.6%	12.3%	7.9%	6.2%	98th	13th of 347
Housing vacancy	31.4%	10.3%	10.5%	10.1%	98th	34th of 344
Homeownership rateStrength	85.6%	69.3%	68.6%	65.2%	90th	107th of 344
Average commuteWeakness	34.2 min	19.4 min	17.8 min	26.4 min	90th	13th of 330
Residents 65 and older	23.4%	20.1%	18%	17.2%	88th	123rd of 347
Government workers	20.6%	15.7%	15.8%	14.5%	86th	104th of 347
Uninsured rateWeakness	12.5%	10.2%	9%	8.4%	82nd	88th of 347
Self-employed workers	12.7%	10.9%	12.1%	10%	81st	249th of 347
Median home value	$473,500	$302,200	$257,400	$332,700	72nd	5th of 302
Median household income	$97,969	$74,517	$75,081	$80,734	70th	45th of 327
Bachelor's degree or higher	43%	34.6%	31.9%	35.7%	70th	23rd of 346
Broadband access	93.6%	90.6%	89.6%	91%	63rd	67th of 344
Per capita income	$43,414	$42,302	$40,550	$44,673	59th	101st of 347
Median earnings per worker	$50,526	$45,147	$46,539	$49,666	57th	92nd of 345
Tech workers	2.6%	2.3%	2.3%	3.8%	45th	49th of 347
Healthcare workers	8.7%	12.4%	10.5%	9.7%	38th	141st of 347
Foreign-born residents	6%	2.5%	4%	14.1%	34th	34th of 347
Residents under 18	19.5%	22%	24.2%	22%	28th	259th of 347
Diversity index	27.3	38.2	35.4	61.4	20th	91st of 347
Work from home	7.3%	9.6%	9.7%	15.1%	18th	230th of 347
Unemployment rateStrength	2.9%	3.2%	2.9%	5.2%	15th	106th of 347
Poverty rateStrength	4.6%	11.2%	11.9%	12.5%	10th	266th of 344
Population density	20/sq mi	41/sq mi	12/sq mi	95/sq mi	3rd	65th of 347
Income inequality (Gini)Strength	0.352	0.460	0.449	0.483	3rd	264th of 343
Population	893	113,512	907,428	334,922,499	1st	156th of 347
Median gross rent	$600	$1,120	$946	$1,413	1st	199th of 243
Rent-burdened rentersStrength	15.9%	48.7%	39.8%	51.1%	1st	223rd of 313

The percentile is the share of Americans who live in a zip code with a lower value, so the 50th percentile is typical. Rank 1 is the highest value in the state. Both include zip codes with at least 100 residents. Strengths and weaknesses mark measures in the best or worst fifth nationally, where higher or lower is clearly better (income, poverty, education, commute, broadband, insurance and similar). Measures like age or density are left unmarked.

People

Age

Under 5

17%

5–17

18–24

25–34

35–44

12%

45–54

25%

55–64

19%

65–74

75+

Median age

54.2

Under 18

19.5%

65 and over

23.4%

Race and ethnicity

White85%
Black0.1%
Hispanic9%
Asian2%
Native American0.1%
Pacific Islander0%
Other0.2%
Multiracial4%

Diversity index

27.3

U.S. 61.4

Foreign-born

U.S. 14.1%

Born in state

40.8%

Language spoken at home (households)

English only

87%

Spanish

Other Indo-European

0.6%

Asian / Pacific

Other

Households

Households: 327
Average household size: 2.7
Family households: 80.1%
Married couples: 74.6%
Living alone: 13.5%
Veterans (of adults): 16.6%
Male / female: 54% / 46%

Income and poverty

Household income distribution

<$25k

$25–50k

14%

$50–75k

16%

$75–100k

14%

$100–150k

16%

$150–200k

25%

$200k+

Median household income

57751

$97,969

Pennington Co.

$74,517

South Dakota

$75,081

United States

$80,734

Per capita income

$43,414

U.S. $44,673

Poverty rate

4.6%

U.S. 12.5%

Households earning $150K+

31.8%

U.S. 23%

Income inequality (Gini)

0.352

U.S. 0.483

Housing

Median home value

57751

$473,500

Pennington Co.

$302,200

South Dakota

$257,400

United States

$332,700

Median gross rent

57751

$600

Pennington Co.

$1,120

South Dakota

$946

United States

$1,413

Types of housing

Single-family

67%

2–4 units

5–19 units

20+ units

Mobile home

23%

Boat, RV, van

Housing units: 477
Owner-occupied: 85.6%
Vacant: 31.4%
Median year built: 1991
Median rooms: 4.6
Renters paying 30%+ of income: 15.9%
Renters paying 50%+ of income: 0%
Home value to income: 4.8× (U.S. 4.1×)

Work and commute

How people get to work

Drove alone

77%

Carpooled

Transit

Walked

10%

Bicycle

Worked from home

Other

Commute time (one way)

<10 min

18%

10–19

20–29

30–44

36%

45–59

29%

60+

Average commute

34.2 min

U.S. 26.4 min

Unemployment

2.9%

U.S. 5.2%

In labor force

66%

U.S. 63.5%

Jobs and careers

What employed residents do, wherever they work

Occupations

Sales

17%

Education

13%

Transportation and moving

11%

Management

10%

Cleaning and personal care

10%

Healthcare

Construction and repair

Farming, fishing and forestry

Business and finance

Engineering and science

Food service

Office and admin

Computer and math

Police and fire

Production

Legal and social services

0.8%

Arts, media and sports

0.2%

Industries

Retail

25%

Health care and social assistance

14%

Education

13%

Restaurants and hotels

11%

Transportation, warehousing and utilities

Agriculture and mining

Professional and technical services

Construction

Public administration

Arts and recreation

Admin, support and management

Other services

Finance, insurance and real estate

Wholesale

0.8%

Information

0.2%

Manufacturing

Median earnings per worker

$50,526

U.S. $49,666

Self-employed

12.7%

U.S. 10%

Government workers

20.6%

U.S. 14.5%

Nonprofit workers

U.S. 8.8%

Median earnings by type of work

Type of work	57751	U.S.
Management, business, science and arts	$72,659	$74,888
Service	$21,500	$26,804
Sales and office	$80,658	$40,476
Construction and maintenance	$42,500	$49,199
Production and transportation	$22,083	$39,989

Education, internet and health coverage

Highest education (adults 25+)

No diploma

High school

32%

Some college

10%

Associate's

Bachelor's

18%

Graduate

25%

High school graduate or higher: 93.9%
Bachelor's degree or higher: 43%
Graduate or professional degree: 25.5%
Households with broadband: 93.6%
Cable, fiber or DSL: 66.7%
No internet access: 6.4%
Without health insurance: 12.5%
Limited-English households: 0%

Geography

City (USPS): Keystone
State: South Dakota
County: Pennington County
Center point: 43.8691° N, 103.4269° W
Land area: 44 sq mi
Water area: under 0.1 sq mi
Time zone: Mountain Time (UTC-7, UTC-6 in summer)
Zip type: Residential delivery area

57751 spans 2 counties

Pennington County67% of land
Custer County33% of land

Cities and towns within this zip

Keystone7% of zip

Census places overlapping the zip's area. Mail may use a different city name than the municipality.

Zip codes near 57751

Search by radius

Zip	City	Distance	Population	IncomeMedian income	Home value
57702	Rapid City, SD	11 mi	35,595	$91,457	$389,700
57730	Custer, SD	15 mi	5,596	$83,469	$378,800
57709	Rapid City, SD · PO box	15 mi	—	—	—
57738	Fairburn, SD	19 mi	356	$52,308	—
57744	Hermosa, SD	20 mi	2,421	$106,250	$386,800
57745	Hill City, SD	20 mi	1,894	$88,194	$343,900
57773	Pringle, SD	21 mi	206	—	—
57701	Rapid City, SD	21 mi	45,795	$56,461	$251,200
57718	Black Hawk, SD	21 mi	7,937	$84,162	$300,100
57703	Rapid City, SD	21 mi	18,013	$83,739	$277,100
57759	Nemo, SD	26 mi	398	$75,500	$555,600
57706	Ellsworth Afb, SD	26 mi	2,787	$57,162	—

Questions about 57751

What city is zip code 57751?

57751 is assigned to Keystone, South Dakota. The city name is the one the Postal Service prefers for mail addressed to this zip code.

What county is 57751 in?

57751 is mostly in Pennington County, but it extends into 1 other county.

What is the population of 57751?

About 893 people live in 57751, according to the Census Bureau's American Community Survey.

What time zone is 57751 in?

57751 is in Mountain Time.

What is the median household income in 57751?

The median household income in 57751 is $97,969.

What zip codes are near 57751?

The closest zip codes to 57751 are 57702, 57730, 57709, 57738, 57744.

Demographic figures are 2020–2024 American Community Survey 5-year estimates for ZIP Code Tabulation Area 57751, from the U.S. Census Bureau. Small areas have wide margins of error. How we build these numbers.