Fort Thompson, SD · standard
ZIP Code 57339
Buffalo County, South Dakota - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 1,525
- 5/sq mi Low-density area
- $46,136
- Median income Below-median income area
- $121,700
- Median home value Below-median home value
- 7.2%
- Bachelor's or higher Below-average bachelor's attainment
National ZIP placement
Fort Thompson pairs one of the lowest household incomes in the country with among the most affordable home values nationally, in a rural, mixed-tenure area.
- 10th pct
- household income, US ZIPs
- 17th pct
- home value, US ZIPs
- 5
- people per sq mi
- 44%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 57339 against every reporting US ZIP.
ZIP code 57339 covers 331.5 square miles in Fort Thompson, Buffalo County, South Dakota (a standard USPS delivery area), with a modest 1,525 residents on file, a density of 5 people per square mile, in the Chicago time zone.
ZIP 57339 reports a modest median household income of $46,136 (40% below the average South Dakota ZIP), while per-capita income is $14,849. Economic pressure is pronounced: 36.3% of residents are below the poverty line and unemployment is 10.0%. Home values sit below the statewide ZIP benchmark: the median is $121,700 (37% below the average South Dakota ZIP), and median rent is $605; owner occupancy is 43.5%.
Formal educational attainment runs low here: just 7.2% of adults hold a bachelor's degree or higher, the median age is 21.3, and the average commute is -. The page also surfaces 1 ZIP codes within roughly 10 miles and 1 more in Buffalo County, so 57339 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 57339, Fort Thompson, 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
1,525
Population
331.5
Area (sq mi)
5
People / sq mi
Chicago
Time Zone
standard
ZIP Type
Who lives in ZIP 57339?
21.3
Median Age
56.5%
Male
43.5%
Female
0.0%
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?
$46,136
Median Household Income
-40% vs state ZIP avg
$14,849
Per Capita Income
36.3%
Poverty Rate
10.0%
Unemployment Rate
How ZIP 57339 ranks among South Dakota ZIPs
Fort Thompson, 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)
$46,136 7th percentile higher than 7% 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
427housing units
427
Total Housing Units
372
Occupied Units
55
Vacant Units
3.74
Avg Household Size
Occupancy Type
$121,700
Median Home Value
-37% vs state ZIP avg
$605
Median Rent
1975
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What businesses operate in this ZIP?
Census Bureau data shows 9 business establishments in ZIP 57339, employing approximately 129 people with a combined annual payroll of $3,838,000.
9
Businesses
129
Employees
$3.8M
Annual Payroll
2
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Retail trade | 3 | 33.3% |
| Health care and social assistance | 3 | 33.3% |
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 57339 vs 57346 →
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 57346 | Stephan, SD | 68 | 10.8 mi |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 57339, both outside SD so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar population
Nearest cross-state ZIPs by resident population (1,525 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Buffalo County
Related Areas
Frequently Asked Questions
What county is ZIP code 57339 in?
ZIP code 57339 (Fort Thompson) is located in Buffalo County, South Dakota. Buffalo County contains multiple ZIP codes, see the full list at /counties/buffalo-sd.
What is the population of ZIP code 57339?
ZIP code 57339 in Fort Thompson, SD has a population of 1,525 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 57339?
The median household income in ZIP 57339 is $46,136, which is 40% below the national average of $76,288.
What is the average home value in ZIP 57339?
The median home value in ZIP 57339 is $121,700, which is 56% below the national average of $278,155.
What is the demographic makeup of ZIP 57339?
The largest racial group in ZIP 57339 is American Indian or Alaska Native at 85.5%. Hispanic or Latino residents make up 1.7% of the population.
How many businesses are in ZIP code 57339?
ZIP code 57339 has 9 business establishments employing approximately 129 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 57339?
In ZIP code 57339, 60.3% of residents aged 25+ have a high school diploma or higher, and 7.2% 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 57339?
In ZIP code 57339, approximately 43.5% of occupied housing units are owner-occupied and 56.5% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 57339?
The poverty rate in ZIP code 57339 is 36.3% 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 57339's numbers, next.
- See how ZIP 57339 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Fort Thompson, 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.