Keystone, SD · standard
ZIP Code 57751
Pennington County, South Dakota - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 844
- 5/sq mi Low-density area
- $97,969
- Median income Above-median income area
- $473,500
- Median home value Above-median home value
- 43.0%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
Keystone pairs an upper-quartile household income with upper-quartile home values, in a rural, homeowner-dominated area.
- Top 20%
- household income, US ZIPs
- Top 15%
- home value, US ZIPs
- 5
- people per sq mi
- 86%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 57751 against every reporting US ZIP.
ZIP code 57751 is a sparsely populated ZIP (a standard USPS delivery area) in Keystone, Pennington County, South Dakota, home to just 844 residents across 175.8 square miles, a density of 5 people per square mile, in the Denver time zone.
ZIP 57751 lands in the middle-income range, with a median household income of $97,969 (28% above the average South Dakota ZIP), while per-capita income is $43,414. Both reported hardship measures are comparatively low in absolute terms: poverty is 4.6% and unemployment is 2.9%. Housing is both higher-cost and owner-heavy: median home value is $473,500 (147% above the average South Dakota ZIP), while 85.6% of occupied homes are owner-occupied and median rent is $600.
A solid share of residents have a four-year degree: 43.0% of adults hold a bachelor's degree or higher, the median age is 54.2, and the average commute is -. No nearby ZIP peer set is available for this delivery area, so the South Dakota and national benchmarks above are the appropriate context for 57751.
Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →
Top industries in ZIP 57751
Top 5 sectors by establishment count in Keystone, SD
Which industries have the most business establishments in ZIP 57751.
- Accommodation and food services
Accommodation and food services
31 establishments
- Retail trade
Retail trade
16 establishments
- Arts, entertainment, and recreation 8
Arts, entertainment, and recreation
8 establishments
- Transportation and warehousing 4
Transportation and warehousing
4 establishments
- Health care and social assistance 4
Health care and social assistance
4 establishments
What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 57751, Keystone, SD · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.
Quick Facts
844
Population
175.8
Area (sq mi)
5
People / sq mi
Denver
Time Zone
standard
ZIP Type
Who lives in ZIP 57751?
54.2
Median Age
53.8%
Male
46.2%
Female
6.0%
Foreign-Born
Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How much do residents earn?
$97,969
Median Household Income
+28% vs state ZIP avg
$43,414
Per Capita Income
4.6%
Poverty Rate
2.9%
Unemployment Rate
How ZIP 57751 ranks among South Dakota ZIPs
Keystone, SD household income vs. every South Dakota ZIP code
Median household income among 337 reporting South Dakota ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$97,969 Top 14% higher than 86% of 337 South Dakota ZIPs
Each bar is a $20K-wide band; taller bars hold more South Dakota ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
477housing units
477
Total Housing Units
327
Occupied Units
150
Vacant Units
2.67
Avg Household Size
Occupancy Type
$473,500
Median Home Value
+147% vs state ZIP avg
$600
Median Rent
1991
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What businesses operate in this ZIP?
Census Bureau data shows 72 business establishments in ZIP 57751, employing approximately 304 people with a combined annual payroll of $18,744,000.
72
Businesses
304
Employees
$18.7M
Annual Payroll
5
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Accommodation and food services | 31 | 43.1% |
| Retail trade | 16 | 22.2% |
| Arts, entertainment, and recreation | 8 | 11.1% |
| Transportation and warehousing | 4 | 5.6% |
| Health care and social assistance | 4 | 5.6% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 57751, both outside SD so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Pennington County
Related Areas
Frequently Asked Questions
What county is ZIP code 57751 in?
ZIP code 57751 (Keystone) is located in Pennington County, South Dakota. Pennington County contains multiple ZIP codes, see the full list at /counties/pennington-sd.
What is the population of ZIP code 57751?
ZIP code 57751 in Keystone, SD has a population of 844 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 57751?
The median household income in ZIP 57751 is $97,969, which is 28% above the national average of $76,288.
What is the average home value in ZIP 57751?
The median home value in ZIP 57751 is $473,500, which is 70% above the national average of $278,155.
What is the demographic makeup of ZIP 57751?
The largest racial group in ZIP 57751 is White at 92.5%. Hispanic or Latino residents make up 9.0% of the population.
How many businesses are in ZIP code 57751?
ZIP code 57751 has 72 business establishments employing approximately 304 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 57751?
The top industries by establishment count in ZIP 57751 are: Accommodation and food services (31), Retail trade (16), Arts, entertainment, and recreation (8). There are 5 industry sectors represented in total.
What is the education level in ZIP code 57751?
In ZIP code 57751, 75.3% of residents aged 25+ have a high school diploma or higher, and 43.0% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 57751?
In ZIP code 57751, approximately 85.6% of occupied housing units are owner-occupied and 14.4% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 57751?
The poverty rate in ZIP code 57751 is 4.6% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.
Related
Take this with you
What to do with ZIP 57751's numbers, next.
- See how ZIP 57751 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Keystone, SD ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
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ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.