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 Low-density area
- $72,500
- Median income Near-median income area
- $162,500
- Median home value Below-median home value
- 14.4%
- Bachelor's or higher Below-average bachelor's attainment
National ZIP placement
Summit pairs an above-median household income with below-median home values, in a rural, homeowner-dominated area.
- Top 49%
- household income, US ZIPs
- 31st 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 average South Dakota ZIP), while per-capita income is $27,829. The poverty rate is 17.9%, with unemployment at 2.9%; those measures add context to the income figure. Home values sit below the statewide ZIP benchmark: the median is $162,500 (15% below the average South Dakota ZIP), and median rent is $775; owner occupancy is 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. The page also surfaces 2 ZIP codes within roughly 10 miles and 6 more in Roberts County, so 57266 can be compared with both its immediate and county-level context.
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
Who lives in ZIP 57266?
33.7
Median Age
57.5%
Male
42.5%
Female
1.1%
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?
$72,500
Median Household Income
-5% vs state ZIP avg
$27,829
Per Capita Income
17.9%
Poverty Rate
2.9%
Unemployment Rate
25.3 min
Mean Commute Time
How ZIP 57266 ranks among South Dakota ZIPs
Summit, 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)
$72,500 45th percentile higher than 45% 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
254housing units
254
Total Housing Units
206
Occupied Units
48
Vacant Units
3.04
Avg Household Size
Occupancy Type
$162,500
Median Home Value
-15% vs state ZIP avg
$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.
- 57266
Summit (57266)
607 residents
- 57263
South Shore (57263)
450 residents
- 57256 127
Ortley (57256)
127 residents
What this shows Among its immediate neighbors, ZIP 57266 ranks the most populous - useful context the national average alone can't give.
ZIP 57266 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 57266
Summit (57266)
$72,500 median income
- 57256
Ortley (57256)
$66,500 median income
- 57263
South Shore (57263)
$58,214 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.
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 57266, 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 Roberts County
Related Areas
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.
Related
Take this with you
What to do with ZIP 57266's numbers, next.
- See how ZIP 57266 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Summit, SD ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.