Population & age
- Total population
- 1,341
- Median age
- 23.4
Fort Thompson, SD (57339)
Buffalo County · Population 1,341
Fresh.Data current as of Apr 24, 2026
Fort Thompson, SD (ZIP 57339) sits in Buffalo County. The page draws on 1 federal data feed retrieved Apr 24. Top health signal: Obesity comes in above the national average at 49.3%. No NCES schools are mapped to this ZIP in the current dataset. 2 colleges and universities serve the area, with median in-state tuition of $20,657. 50% of returns claim the Earned Income Tax Credit (IRS), a higher share than most ZIPs. Local establishments report average pay of $27,813 per worker (Census ZBP) — below the US average. BLS QCEW reports average annual pay of $50,972 per worker, roughly 22% below the US average. CDC's Social Vulnerability Index places this ZIP in the 97th percentile nationally — a highly vulnerable community profile. FEMA has issued 20 federal disaster declarations affecting this ZIP since 1969 — a high-frequency exposure profile. County Health Rankings reports 46,418 years of potential life lost per 100,000 (2025) — well above the national county median. South Dakota has no state income tax, saving the local median household (AGI $33,243) approximately $1,529/year vs the US average effective state tax rate. IRS migration data (2022-2023) shows a net gain of 24 residents (9 households) — the ZIP's primary county is growing. Both healthcare access and on-paper school density skew lighter than national norms; what shows up here is a snapshot, not a verdict — neighborhood-level texture matters at this scale. Notable: median household income $26,429, fair market rent of $1,210 for a two-bedroom, and a 44.0% poverty rate (well above the ~12% US average). Every figure on this page links to its underlying federal dataset with a retrieval date so you can audit the freshness yourself.
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Demographics
Race & ethnicity
- White
- 7.9%
- Black
- 0.0%
- Asian
- 0.0%
- Hispanic / Latino
- 5.9%
- Other / multi-racial
- 1.4%
Income & housing
- Median household income
- $26,429
- Median home value
- $109,100
Education
- Bachelor's degree or higher (age 25+)
- 5.4%
Employment
- Unemployment rate
- 17.3%
Housing
- Owner-occupied
- 137(41.8%)
- Renter-occupied
- 191(58.2%)
- Vacant units
- 65
- Built (median)
- 1975
Commute
- Public transit
- 0(0.0%)
- Work from home
- 39(10.1%)
- Avg commute
- 11.7 min
Economic wellbeing
- Below poverty line
- 583(44.0%)
- Uninsured
- 154(11.5%)
Digital access
- Broadband access
- 173(52.7%)
- No broadband
- 155(47.3%)
Language & nativity
- Foreign-born
- 0(0.0%)
- Non-English at home
- 89(7.9%)
Fair Market Rent
Fresh.HUD SAFMR · May 1, 2026Studio
$830
/month
1 Bed
$920
/month
2 Bed
$1,210
/month
3 Bed
$1,450
/month
4 Bed
$1,870
/month
HUD Fair Market Rents represent the 40th percentile of standard-quality rental housing in this area. FY2026 data.
Income & tax statistics
Tax returns filed
460
Average AGI
$33,243
Avg property tax
—
EITC participation
50.0%
Income distribution
- $1 – $25,00045.7% · 210
- $25,000 – $50,00032.6% · 150
- $50,000 – $75,00013.0% · 60
- $75,000 – $100,0004.3% · 20
- $100,000 – $200,0004.3% · 20
- $200,000 or more0.0% · 0
Avg mortgage interest
—
Avg charitable contribution
—
Avg capital gains
—
Avg total income tax
—
Source: IRS Statistics of Income — Individual Income Tax Statistics by ZIP Code (irs.gov). Public domain. Dollar columns reported in thousands by the IRS; figures here display real dollars. Total ZCTA AGI for the area was $15.3M across all reported brackets.
Business & employment
Business establishments
8
Total employment
150
Annual payroll
$4.2M
Average annual pay
$27,813
Source: U.S. Census Bureau, ZIP Business Patterns (census.gov). Public domain. ZBP covers establishments with paid employees; Census suppresses employment and payroll values when fewer employers operate in a ZIP than would protect their confidentiality.
Employment & wages
Average annual pay
$50,972
Average weekly wage
$980
Total employment
538
Total establishments
27
That is roughly 22% below the US national average of $65,470 per worker.
Source: U.S. Bureau of Labor Statistics, Quarterly Census of Employment and Wages (bls.gov/cew). Public domain. QCEW is derived from state unemployment-insurance filings and covers ~95% of US jobs. Figures are county-level totals assigned to ZIPs whose primary county matches; small-employer cells are suppressed by BLS to protect employer confidentiality.
Unemployment
Unemployment rate
4.6%
That is 0.6 percentage points above the US national unemployment rate of about 4.0%.
Labor force
652
Employed
622
Unemployed
30
Based on Buffalo County, SD data (2024).
Source: U.S. Bureau of Labor Statistics, Local Area Unemployment Statistics (bls.gov/lau). Public domain. LAUS publishes monthly and annual labor-force estimates for every US county. Figures are county-level totals assigned to ZIPs whose primary county matches.
Community health centers
Federally funded health-center sites
1
Single health-center site
One federally funded community health center serves this ZIP. Residents who need same-day care or specialty services may rely on neighboring ZIPs.
FQHC sites
1
federally qualified
Look-Alike sites
0
FQHC equivalents
Avg hours / week
44
across sites in this ZIP
Sites in this ZIP
- 1.Horizon Health - Fort Thompson
Federally Qualified Health Centers (FQHCs) and Look-Alike sites provide primary care on a sliding-fee scale, regardless of ability to pay. Active sites only; data refreshed 2026.
Source: HRSA Bureau of Primary Health Care (data.hrsa.gov). Per-ZIP counts of active service-delivery sites operated by Health Center Program grantees and Look-Alike organizations.
Federal Disaster Declarations
Federally Declared Disasters
20
Date Range
1969–2024
Most Recent Declaration
SEVERE STORMS, STRAIGHT-LINE WINDS, AND FLOODING
Flood — declared August 15, 2024 (DR-4807)
Incident period: June 16, 2024 – July 8, 2024
Top Incident Types
- Flood8 (40%)
- Severe Storm6 (30%)
- Biological2 (10%)
- Snowstorm2 (10%)
- Coastal Storm1 (5%)
- Other1 (5%)
Individual Assistance
3
Direct help to disaster survivors
Households Program
1
Housing & temporary lodging support
Public Assistance
19
Repair of public facilities & roads
Hazard Mitigation
9
Funding to reduce future disaster risk
FEMA declares disasters at the county level; counts here include every federally declared disaster touching any county that overlaps this ZIP. Statewide declarations and pre-1964 records without county granularity are excluded. Program flags reflect which FEMA assistance categories were activated (Individual Assistance, Households, Public Assistance, Hazard Mitigation). Source: fema.gov/openfema. Public domain.
Climate
30-year averages (1991-2020) from the nearest GHCN-D weather station. Temperature and precipitation values reflect typical annual conditions, not any single year.
Avg. temperature
46.7°F
33.9° – 59.5°
Annual precipitation
20.1"
Annual snowfall
18.9"
Heating · cooling days
7,441.2 · 801.7
Annual base 65°F
Nearest station: LAKE SHARPE PRJ, SD US, 4.3 miles from the centroid of Fort Thompson, SD (ZIP 57339)
Source: NOAA National Centers for Environmental Information, 1991–2020 U.S. Climate Normals (ncei.noaa.gov). Public domain.
Community health profile
Years of potential life lost (per 100K)
46,418
That is roughly 38,218 years per 100,000 above the national county median (~8,200).
Premature death is the headline composite outcome CHR reports — age-adjusted, all-cause, before age 75.
Fair or poor health
32%
of adults self-report
Poor physical health days
5.6
avg per adult per month
Poor mental health days
6.0
avg per adult per month
Uninsured
12.8%
of residents under 65
Primary care MDs
0
per 100,000 residents
Preventable hospital stays
—
per 100K Medicare enrollees
Food environment (0-10)
5.2
10 = best access & security
Exercise access
—
residents near a facility
Flu vaccinated
39%
of Medicare enrollees
Low birth weight (under 2,500 g) accounts for 8.1% of live births in this county — an early-life health input that downstream outcomes track against.
Based on Buffalo data (2025 CHR release).
Source: County Health Rankings & Roadmaps, University of Wisconsin Population Health Institute (countyhealthrankings.org). Annual release. Underlying source datasets vary by measure (CDC BRFSS, NCHS Vital Statistics, AHA, USDA Food Environment Atlas, and others). Figures are county-level and assigned to every ZIP whose primary county matches.
Food access
Food access status
Moderate food access challenges
18.1% of Buffalo County, SD residents live more than 1 mile (urban) or 10 miles (rural) from the nearest supermarket.
Grocery stores
—
per 1,000 residents
Supercenters & clubs
—
per 1,000 residents
SNAP-authorized stores
2.15
accepting food benefits
Fast-food restaurants
—
per 1,000 residents
Among low-income residents, 12.1% are low-access — those without a supermarket within 1 mile (urban) or 10 miles (rural).
Per-1,000 figures show how many of each store type exist in Buffalo County, SD for every 1,000 residents. Higher grocery and supercenter density usually means easier access to fresh food; higher convenience-store-only density (with low grocery rate) often signals a food swamp.
Source: USDA Economic Research Service, Food Environment Atlas (ers.usda.gov). County-level metrics fanned to ZIP via the primary county in the Census ZCTA-county relationship file. Variable years differ per family (stores ~2020, low-access ~2019).
Who’s moving in and out
Net migration (2022-2023)
▲+24 people
+9 households • +$503K net AGI flow
Moved in
30households
65 people • $962K AGI
Moved out
21households
41 people • $459K AGI
Where new residents came from
No county-level breakdown available.
Where departing residents went
No county-level breakdown available.
Incoming households reported an average AGI of $32,067 versus departing households' $21,857.
Source: U.S. Internal Revenue Service, Statistics of Income, Migration Data (irs.gov). Public domain. Migration is measured by year-over-year changes in the address on individual tax returns; figures are county-level totals attributed to ZIPs whose primary county matches. Foreign migration contributes to inflow/outflow totals but does not appear in the top-county lists. Small flows are suppressed by IRS to protect taxpayer confidentiality.
Taxes & benefits in South Dakota
State-level rules that apply to every resident of ZIP 57339. Numbers reflect the most recent published year per source.
Tax rates
Income tax
None
No state income tax
Sales tax (combined)
6.11%
State 4.20% · avg local 1.91%
Property tax (effective)
0.59%
Median $595/year
Tax burden rank
5 of 50
8.60% of personal income
For ZIP 57339: A household at this ZIP's median AGI of $33,243 keeps approximately $1,529 more annually than residents of the typical income-tax state. Applied to this ZIP's typical home value of $109,100, that works out to roughly $638/year in property tax.
Paid family leave
Program
No program
No program
Safety net
SNAP eligibility
130% FPL
Federal 130% FPL gross income limit. Asset limit $3,000.
Sources: Tax Foundation (state tax rates & brackets), Bipartisan Policy Center (paid family leave), USDA FNS (SNAP categorical eligibility).
Other ZIPs near 57339
Nearby ZIPs by distance
57548 (West Brule, 6.8 mi) · 57346 (Stephan, 8.5 mi) · 57341 (Gann Valley, 17.3 mi) · 57569 (Reliance, 19 mi) · 57325 (Chamberlain, 21.5 mi) · 57365 (Oacoma, 21.9 mi)
Compare ZIP-level stats — population, schools, housing, climate — across nearby areas. Source: U.S. Census Bureau ZCTA basemap.
Data sources used on this page
All data on this page is sourced from federal government datasets · Not AI-generated · Methodology
Health profile
Crude prevalence estimates from CDC PLACES, derived from BRFSS small-area modeling. Population-level figures only.
Obesity
49.3%
16.3pp above the 33.0% national rate.
High Blood Pressure
36.8%
4.8pp above the 32.0% national rate.
Depression
22.5%
Tracks close to the 22.0% national rate.
Annual Checkup
73.5%
2.5pp below the 76.0% national rate.
Health Insurance
14.5%
Tracks close to the 13.0% national rate.
Diabetes
19.2%
8.2pp above the 11.0% national rate.
Colleges & universities nearby
Colleges in this area
2
Median in-state tuition
$20,657
Median earnings (10 yr)
$52,236
- 2-Year
Mitchell Technical College
Mitchell, SD · 57301
- In-state tuition
- $7,524
- Out-of-state tuition
- $7,524
- Acceptance rate
- —
- Graduation rate
- 73.7%
- Median earnings (10 yr)
- $50,743
- Median student debt
- $12,000
- 4-Year
Dakota Wesleyan University
Mitchell, SD · 57301
- In-state tuition
- $33,790
- Out-of-state tuition
- $33,790
- Acceptance rate
- 73.4%
- Graduation rate
- 47.3%
- Median earnings (10 yr)
- $53,728
- Median student debt
- $27,000
Source: U.S. Department of Education College Scorecard (collegescorecard.ed.gov). Public domain data. Earnings figures reflect median earnings 10 years after entry for federally-aided students.
What these numbers say together
Fort Thompson, SD (ZIP 57339) sits in Buffalo County. The page draws on 1 federal data feed retrieved Apr 24. Top health signal: Obesity comes in above the national average at 49.3%. No NCES schools are mapped to this ZIP in the current dataset. 2 colleges and universities serve the area, with median in-state tuition of $20,657. 50% of returns claim the Earned Income Tax Credit (IRS), a higher share than most ZIPs. Local establishments report average pay of $27,813 per worker (Census ZBP) — below the US average. BLS QCEW reports average annual pay of $50,972 per worker, roughly 22% below the US average. CDC's Social Vulnerability Index places this ZIP in the 97th percentile nationally — a highly vulnerable community profile. FEMA has issued 20 federal disaster declarations affecting this ZIP since 1969 — a high-frequency exposure profile. County Health Rankings reports 46,418 years of potential life lost per 100,000 (2025) — well above the national county median. South Dakota has no state income tax, saving the local median household (AGI $33,243) approximately $1,529/year vs the US average effective state tax rate. IRS migration data (2022-2023) shows a net gain of 24 residents (9 households) — the ZIP's primary county is growing. Both healthcare access and on-paper school density skew lighter than national norms; what shows up here is a snapshot, not a verdict — neighborhood-level texture matters at this scale. Notable: median household income $26,429, fair market rent of $1,210 for a two-bedroom, and a 44.0% poverty rate (well above the ~12% US average). Every figure on this page links to its underlying federal dataset with a retrieval date so you can audit the freshness yourself.
The two domains pull in different directions. Healthcare access reads strong, but the on-paper school count is on the lighter side — that’s less a quality signal and more a density one. Households here often look at districts a few ZIPs over for school choice while keeping their providers local.
- Fair market rent for a two-bedroom ($1,210/month, HUD SAFMR) represents 55% of median household income ($26,429, Census ACS) — above the 30% affordability threshold commonly used by housing experts.
- Lower median household income ($26,429, Census ACS) sits alongside an above-average 49.3% obesity rate (CDC PLACES) — a pattern that correlates with reduced healthcare access in lower-income areas.
One concrete reading worth keeping: Depression prevalence sits near the national rate at 22.5%. Each figure on this page links to the original federal dataset with its retrieval date — this synthesis is a reading, not a substitute for the underlying records.
Frequently Asked Questions — ZIP 57339
What is the obesity rate in ZIP 57339?
49.3%, which is 16.3 percentage points above the national average of 33.0% (CDC PLACES, retrieved Apr 24, 2026).
What is the depression rate in ZIP 57339?
22.5%, which is 0.5 percentage points above the national average of 22.0% (CDC PLACES, retrieved Apr 24, 2026).
What is the high blood pressure rate in ZIP 57339?
36.8%, which is 4.8 percentage points above the national average of 32.0% (CDC PLACES, retrieved Apr 24, 2026).
What is the population of ZIP 57339?
1,341 people live in ZIP 57339, with a median age of 23.4 (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
What is the median household income in ZIP 57339?
$26,429 per year (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
Is ZIP 57339 mostly renters or homeowners?
In ZIP 57339, 41.8% of occupied housing units are owner-occupied and 58.2% are renter-occupied (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
How do people commute in ZIP 57339?
In ZIP 57339, 10.1% of workers work from home. Public transit is used by 0.0% of commuters (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
What is the poverty rate in ZIP 57339?
44.0% of the population in ZIP 57339 lives below the federal poverty line (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
What percentage of households in ZIP 57339 have broadband internet?
52.7% of households in ZIP 57339 have broadband internet access (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
What is the average household income in ZIP 57339?
The average Adjusted Gross Income reported on tax returns from ZIP 57339 (Fort Thompson, SD) is $33,243 per return (IRS SOI Tax Year 2022, retrieved May 2, 2026).
How much do homeowners pay in property tax in ZIP 57339?
Tax returns from ZIP 57339 report an average of $0 per return in real-estate tax deductions (IRS SOI Tax Year 2022, retrieved May 2, 2026).
What percentage of residents in ZIP 57339 earn over $200,000?
0.0% of tax returns from ZIP 57339 (Fort Thompson, SD) report Adjusted Gross Income of $200,000 or more (IRS SOI Tax Year 2022, retrieved May 2, 2026).
How many businesses are in ZIP 57339?
As of 2022, 8 business establishments operated in ZIP 57339 employing 150 workers (Census ZIP Business Patterns, retrieved May 3, 2026).
What is the average salary in ZIP 57339?
The average annual pay across all local establishments in ZIP 57339 is $27,813, based on Census ZIP Business Patterns 2022 data (retrieved May 3, 2026).
How vulnerable is ZIP 57339 to disasters and public health emergencies?
According to the CDC Social Vulnerability Index (2022), ZIP 57339 ranks in the 97th percentile nationally for social vulnerability — a very high vulnerability profile (retrieved May 3, 2026).
What is the biggest vulnerability factor in ZIP 57339?
Socioeconomic Status is the highest-scoring CDC SVI theme for ZIP 57339, ranking in the 96th percentile nationally (CDC/ATSDR Social Vulnerability Index 2022, retrieved May 3, 2026).
How many federally declared disasters has ZIP 57339 experienced?
FEMA has recorded 20 federal disaster declarations affecting ZIP 57339 between 1969–2024 (FEMA OpenFEMA Disaster Declarations, retrieved May 3, 2026).
What kinds of disasters most often hit ZIP 57339?
Flood is the most common federally declared disaster type affecting ZIP 57339, accounting for 8 of 20 declarations (40%, FEMA OpenFEMA, retrieved May 3, 2026).
What was the most recent disaster declared for ZIP 57339?
The most recent FEMA disaster declaration affecting ZIP 57339 was "SEVERE STORMS, STRAIGHT-LINE WINDS, AND FLOODING" — a flood declared in 2024 (DR-4807) (FEMA OpenFEMA, retrieved May 3, 2026).
What colleges are near ZIP 57339?
2 colleges and universities are listed near ZIP 57339 by the U.S. Department of Education College Scorecard, including Mitchell Technical College and Dakota Wesleyan University (retrieved May 2, 2026).
What is the average tuition at colleges near ZIP 57339?
Median in-state tuition across 2 nearby institutions is $20,657 (College Scorecard, retrieved May 2, 2026).
What do graduates earn from colleges near ZIP 57339?
Graduates of nearby colleges earn a median of $52,236 ten years after entry (College Scorecard, retrieved May 2, 2026).
What is the climate like in ZIP 57339?
ZIP 57339 has an average annual temperature of 46.7°F and 20.1" of annual precipitation based on the LAKE SHARPE PRJ, SD US weather station 4.3 miles from the ZIP centroid (NOAA 1991–2020 Climate Normals, retrieved May 8, 2026).
What taxes apply in ZIP 57339?
South Dakota has no state income tax. For a household earning the local median AGI of $33,243, this saves approximately $1,529 per year compared to the national average effective state tax rate. The combined state and local sales tax rate is 6.11% (Tax Foundation 2025).
Does South Dakota have paid family leave?
South Dakota has no state paid family leave program (Bipartisan Policy Center 2026).
What data is available for ZIP 57339?
This page covers health outcomes from CDC PLACES (33 metrics), demographics from the Census ACS 5-Year (2022), colleges from the U.S. Department of Education College Scorecard (2 institutions), income & tax statistics from the IRS SOI (Tax Year 2022), local business & employment from Census ZIP Business Patterns (2022), social vulnerability scores from the CDC/ATSDR SVI (2022), federal disaster declarations from FEMA OpenFEMA (20 on record), climate normals from NOAA NCEI (1991-2020), and state-level tax rates from the Tax Foundation. Data is refreshed on Mubboo's standard schedule.
How current is this data?
Health data retrieved Apr 24, 2026 from CDC PLACES. Demographics retrieved Apr 30, 2026 from Census ACS 5-Year (2022). College data retrieved May 2, 2026 from U.S. Dept of Education College Scorecard. Income & tax statistics retrieved May 2, 2026 from IRS SOI (Tax Year 2022). Business & employment retrieved May 3, 2026 from Census ZBP (2022). Social vulnerability scores retrieved May 3, 2026 from CDC/ATSDR SVI (2022). Federal disaster declarations retrieved May 3, 2026 from FEMA OpenFEMA (20 on record). Climate normals retrieved May 8, 2026 from NOAA NCEI (1991-2020). State-level tax rates retrieved 2026-05-05 15:58:22.284+00 from the Tax Foundation.
Other ZIPs near 57339
Nearby ZIPs by distance
57548 (West Brule, 6.8 mi) · 57346 (Stephan, 8.5 mi) · 57341 (Gann Valley, 17.3 mi) · 57569 (Reliance, 19 mi) · 57325 (Chamberlain, 21.5 mi) · 57365 (Oacoma, 21.9 mi)
Compare ZIP-level stats — population, schools, housing, climate — across nearby areas. Source: U.S. Census Bureau ZCTA basemap.
More Info topics
Have a specific question about ZIP 57339?
Ask Mubboo — launching Q4 2026.
Data refreshed via Mubboo's ETL pipeline; oldest source on this page retrieved Apr 24, 2026.
Social Vulnerability Index
Overall SVI
97th percentile
Very High Vulnerability
Based on 1 census tract, population 214
Vulnerability Themes
Households Without Vehicle
8
Limited English Speakers
2
Persons with Disability
30
Without HS Diploma
18
Without Health Insurance
85
Adults Age 65+
16
The Social Vulnerability Index uses U.S. Census data to identify communities most at risk during public health emergencies and natural disasters. Higher percentiles indicate greater vulnerability. Tract-level scores are aggregated to this ZCTA via Census 2020 ZCTA→Tract crosswalk, weighted by land-area share. Source: atsdr.cdc.gov. Public domain.