PlainZIP

Summit, SD · standard

ZIP Code 57266

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

607
2/sq mi
$72,500
Median income
$162,500
Median home value
14.4%
Bachelor's or higher

The verdict

Summit pairs an above-median household income with below-median home values, in a rural, homeowner-dominated area.

Top 49%
household income, US ZIPs
31th pct
home value, US ZIPs
2
people per sq mi
74%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 57266 against every reporting US ZIP.

ZIP code 57266 is a sparsely populated ZIP (a standard USPS delivery area) in Summit, Roberts County, South Dakota, home to just 607 residents across 337.2 square miles, a density of 2 people per square mile, in the Chicago time zone.

ZIP 57266 lands in the middle-income range, with a median household income of $72,500 (5% below the South Dakota average), while per-capita income is $27,829. Local economic indicators show a 17.9% poverty rate alongside 2.9% unemployment. Median home value sits at $162,500 (15% below the state average), median rent at $775 a month, and owner-occupancy at 74.3%.

Formal educational attainment runs low here: just 14.4% of adults hold a bachelor's degree or higher, the median age is 33.7, and the average commute is 25 minutes. To put 57266 in local context, 2 ZIP codes within roughly 10 miles appear further down this page alongside 6 additional ZIPs in Roberts County, for a geography-aware comparison.

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 57266, Summit, 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

607

Population

337.2

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 57266?

33.7

Median Age

57.5%

Male

42.5%

Female

1.1%

Foreign-Born

White 76.0%
African American 0.3%
Asian 0.3%
American Indian or Alaska Native 14.2%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 5.0%
Hispanic or Latino 6.2%

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?

$72,500

Median Household Income

-5% vs state

$27,829

Per Capita Income

17.9%

Poverty Rate

2.9%

Unemployment Rate

25.3 min

Mean Commute Time

How ZIP 57266 ranks nationally

Summit, SD household income vs. every US ZIP code

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

$72,500 Top 49% higher than 51% 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%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). This entry sits in this band. $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 55.8%
Bachelor's Degree or Higher 14.4%

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

What does housing look like?

254

Total Housing Units

206

Occupied Units

48

Vacant Units

3.04

Avg Household Size

Occupancy Type

Owner 74.3%
Renter 25.7%

$162,500

Median Home Value

-15% vs state

$775

Median Rent

1953

Median Year Built

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

What businesses operate in this ZIP?

Census Bureau data shows 19 business establishments in ZIP 57266, employing approximately 116 people with a combined annual payroll of $6,323,000.

19

Businesses

116

Employees

$6.3M

Annual Payroll

2

Industry Sectors

Industry Establishments % of Total
Construction 5 26.3%
Retail trade 3 15.8%

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 57266 vs 57256 →

ZIP 57266 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 57266 ranks the most populous - useful context the national average alone can't give.

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

ZIP 57266 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 57266 ranks the highest 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
57256 Ortley, SD 127 4.7 mi
57263 South Shore, SD 450 10.8 mi

More ZIP Codes in Roberts County

57262 standard
Sisseton, SD
Pop: 4,963
57260 standard
Rosholt, SD
Pop: 1,093
57279 standard
Wilmot, SD
Pop: 1,058
57257 standard
Peever, SD
Pop: 810
57255 standard
New Effington, SD
Pop: 538
57227 standard
Corona, SD
Pop: 434

Related Areas

Roberts County Summit, SD South Dakota

Frequently Asked Questions

What county is ZIP code 57266 in? ▼
ZIP code 57266 (Summit) is located in Roberts County, South Dakota. Roberts County contains multiple ZIP codes, see the full list at /counties/roberts-sd.
What is the population of ZIP code 57266? ▼
ZIP code 57266 in Summit, SD has a population of 607 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 57266? ▼
The median household income in ZIP 57266 is $72,500, which is 5% below the national average of $76,288.
What is the average home value in ZIP 57266? ▼
The median home value in ZIP 57266 is $162,500, which is 42% below the national average of $278,155.
What is the demographic makeup of ZIP 57266? ▼
The largest racial group in ZIP 57266 is White at 76.0%. Hispanic or Latino residents make up 6.2% of the population.
How many businesses are in ZIP code 57266? ▼
ZIP code 57266 has 19 business establishments employing approximately 116 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 57266? ▼
In ZIP code 57266, 55.8% of residents aged 25+ have a high school diploma or higher, and 14.4% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 57266? ▼
The mean commute time for workers in ZIP code 57266 is 25.3 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend less time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 57266? ▼
In ZIP code 57266, approximately 74.3% of occupied housing units are owner-occupied and 25.7% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 57266? ▼
The poverty rate in ZIP code 57266 is 17.9% 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.