PlainZIP

Oldham, SD · standard

ZIP Code 57051

Kingsbury County, South Dakota - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

263
2/sq mi
$56,250
Median income
$112,500
Median home value
26.4%
Bachelor's or higher

The verdict

Oldham pairs one of the lowest household incomes in the country with among the most affordable home values nationally, in a rural, homeowner-dominated area.

23th pct
household income, US ZIPs
14th pct
home value, US ZIPs
2
people per sq mi
96%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 57051 against every reporting US ZIP.

ZIP code 57051 is a sparsely populated ZIP (a standard USPS delivery area) in Oldham, Kingsbury County, South Dakota, home to just 263 residents across 164.4 square miles, a density of 2 people per square mile, in the Chicago time zone.

ZIP 57051 reports a modest median household income of $56,250 (27% below the South Dakota average), while per-capita income is $50,626. Local economic indicators show a 8.0% poverty rate alongside 4.5% unemployment. Housing costs here run $112,500 for a typical home value (41% below the state average), with rent averaging - a month; 95.8% of homes are owner-occupied.

Educational attainment sits below the national norm: 26.4% of adults hold a bachelor's degree or higher, the median age is 60.1, and the average commute is -. We also surface 2 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Kingsbury County, so you can benchmark 57051 against its immediate geography rather than a national average alone.

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 →

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 57051, Oldham, 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

263

Population

164.4

Area (sq mi)

2

People / sq mi

Chicago

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 57051?

60.1

Median Age

51.5%

Male

48.5%

Female

1.2%

Foreign-Born

White 91.4%
African American 0.0%
Asian 0.0%
American Indian or Alaska Native 1.2%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 7.4%
Hispanic or Latino 3.1%

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?

$56,250

Median Household Income

-27% vs state

$50,626

Per Capita Income

8.0%

Poverty Rate

4.5%

Unemployment Rate

How ZIP 57051 ranks nationally

Oldham, SD household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$56,250 23rd percentile higher than 23% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). This entry sits in this band. $60,000–$80,000: 9,980 US ZIPs (33%). Above this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Above this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Above this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US 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?

High School Graduate or Higher 57.9%
Bachelor's Degree or Higher 26.4%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

129

Total Housing Units

95

Occupied Units

34

Vacant Units

1.72

Avg Household Size

Occupancy Type

Owner 95.8%
Renter 4.2%

$112,500

Median Home Value

-41% vs state

1938

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What businesses operate in this ZIP?

Census Bureau data shows 10 business establishments in ZIP 57051, employing approximately 52 people with a combined annual payroll of $2,188,000.

10

Businesses

52

Employees

$2.2M

Annual Payroll

0

Industry Sectors

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 57051 vs 57249 →

ZIP 57051 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 57051 ranks #3 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 57051 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 57051 ranks #3 of 3 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
57249 Lake Preston, SD 994 10.0 mi
57054 Ramona, SD 502 8.0 mi

More ZIP Codes in Kingsbury County

57212 standard
Arlington, SD
Pop: 2,062
57231 standard
De Smet, SD
Pop: 1,695
57249 standard
Lake Preston, SD
Pop: 994
57353 standard
Iroquois, SD
Pop: 829
57233 standard
Erwin, SD
Pop: 118
57214 standard
Badger, SD
Pop: 75

Related Areas

Kingsbury County Oldham, SD South Dakota

Frequently Asked Questions

What county is ZIP code 57051 in? ▼
ZIP code 57051 (Oldham) is located in Kingsbury County, South Dakota. Kingsbury County contains multiple ZIP codes, see the full list at /counties/kingsbury-sd.
What is the population of ZIP code 57051? ▼
ZIP code 57051 in Oldham, SD has a population of 263 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 57051? ▼
The median household income in ZIP 57051 is $56,250, which is 26% below the national average of $76,288.
What is the average home value in ZIP 57051? ▼
The median home value in ZIP 57051 is $112,500, which is 60% below the national average of $278,155.
What is the demographic makeup of ZIP 57051? ▼
The largest racial group in ZIP 57051 is White at 91.4%. Hispanic or Latino residents make up 3.1% of the population.
How many businesses are in ZIP code 57051? ▼
ZIP code 57051 has 10 business establishments employing approximately 52 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 57051? ▼
In ZIP code 57051, 57.9% of residents aged 25+ have a high school diploma or higher, and 26.4% 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 57051? ▼
In ZIP code 57051, approximately 95.8% of occupied housing units are owner-occupied and 4.2% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 57051? ▼
The poverty rate in ZIP code 57051 is 8.0% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.