PlainZIP

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
$46,136
Median income
$121,700
Median home value
7.2%
Bachelor's or higher

The verdict

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 South Dakota average), while per-capita income is $14,849. Local economic indicators show a 36.3% poverty rate alongside 10.0% unemployment. On housing, the median home value is $121,700 (37% below the state average) with median rent at $605 per month, and 43.5% of occupied units are owner-occupied.

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 -. To put 57339 in local context, 1 ZIP codes within roughly 10 miles appear further down this page alongside 1 additional ZIPs in Buffalo 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 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

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 57339?

21.3

Median Age

56.5%

Male

43.5%

Female

0.0%

Foreign-Born

White 11.1%
African American 0.0%
Asian 0.0%
American Indian or Alaska Native 85.5%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 3.4%
Hispanic or Latino 1.7%

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

$14,849

Per Capita Income

36.3%

Poverty Rate

10.0%

Unemployment Rate

How ZIP 57339 ranks nationally

Fort Thompson, SD household income vs. every US ZIP code

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

$46,136 10th percentile higher than 10% 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 60.3%
Bachelor's Degree or Higher 7.2%

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

What does housing look like?

427

Total Housing Units

372

Occupied Units

55

Vacant Units

3.74

Avg Household Size

Occupancy Type

Owner 43.5%
Renter 56.5%

$121,700

Median Home Value

-37% vs state

$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

More ZIP Codes in Buffalo County

57341 standard
Gann Valley, SD
Pop: 151

Related Areas

Buffalo County Fort Thompson, SD South Dakota

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.

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