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South Dakota›Tripp County
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Irwin TownshipSD

A town of 22.

Population
22
2025 Census estimate · +0% since 2020

Is Irwin Township a good place to live?

Irwin Township has fewer than 1,000 residents, too few for fair grades; the figures below are still real.

Small town

22 people, and everyone knows the way

In a town this size, neighbors are the best guide. Ask them anything.

Nearby towns
Dallas · 5 miEdens Township · 5 miElliston Township · 6 miSully Township · 7 miColome Township · 7 miColome · 8 mi
Edens TownshipSully TownshipElliston TownshipColome TownshipEdens TownshipSully TownshipElliston TownshipColome TownshipIrwin Township
Getting set up

Moving to Irwin Township: who provides what

Who provides power, water and the rest in Irwin Township, and how to reach them.

The full setup list →
PowerRosebud Electric Coop11.9¢/kWh · EIA 2025HIFLD · EIA
WaterTripp County Water User DistrictNo health-based violations in 5 years · EPAEPA
Internet2 providers100% of addresses get 100/20 MbpsFCC
Trash & dumpNot on file yetWe don’t have Irwin Township’s trash rules yet
SchoolsGregory School District 26-4Which school depends on your addressNCES
Register to voteIn personSouth Dakota has no online registration; you can register in person until 15 days before Election Day or by mail (received 15 days before).vote.gov
Who runs elections hereTripp County AuditorTripp County; contacts on the Handbook page.FVAP, Sep 2017
ZIP code5752957529 100%Census 2020

EPA SDWIS (Oct 9, 2026) · HIFLD + EIA-861 2025 · Census 2020 ZCTAs · NCES 2024–25 · registration: vote.gov, updated Aug 3, 2026.

The data

Ordered by what stands out in Irwin Township.

Natural hazards

Irwin Township faces a high natural-hazard risk, led by inland flooding

The FEMA hazard score in Irwin Township is 69 of 100. Expected losses in Irwin Township break down as 44% from inland flooding and 30% from cold waves.

69risk score of 100
FEMA risk score
69High riskLowerHigher
Inland floodingCold wavesTornadoes
Full pageIrwin Township’s hazards pageOpen the page
What it facesHigh riskFlood claims0 paid flood claims · No paid flood claims on recordPast disasters18 disaster declarations · Declared for the countyGet ready0.9 events a year, on average · Ready for inland flooding

FEMA National Risk Index · OpenFEMA

Climate

Irwin Township: snowy winters and pleasant summers

Irwin Township’s July high is 88°F.

45″snow a winter

Typical low → high °F

Winter14–35°
Spring34–59°
Summer59–84°
Fall37–62°
Oct 3
typical first frost
May 6
typical last frost
+1.3°
vs. the 20th-century average
Full pageIrwin Township’s climate pageOpen the page
A year of weatherJuly highs 88°, January lows 11°Rain & snow45″ of snow a winter · 23 inches of rain and snow a yearHeating & coolingMostly a heating billThen and now+1.3° vs. the 20th century · Warmer than the 20th-century average

NOAA U.S. Climate Normals, 1991–2020

Health

How healthy Irwin Township is

20% of Irwin Township adults have been diagnosed with depression. Of 26 CDC measures, Irwin Township beats the South Dakota average on 2 and trails it on 9. Only 2 of the 36 South Dakota towns we compare have a higher share of adults who have high blood pressure than Irwin Township.

Irwin TownshipSouth Dakota townsU.S. towns
Diabetes (CDC PLACES)15%10%12%
High blood pressure (CDC PLACES)40%31%35%
Sleep under 7 hours (CDC PLACES)29%30%36%
Depression (CDC PLACES)20%22%23%
26 measures vs. South Dakota
2 better15 too close to call9 worse
What stands outIrwin TownshipSD
More adults treating high blood pressure81%75.9%
More adults getting cholesterol checked86.9%84.8%
More adults with heart disease9.6%6.8%
Avera Gregory Hospital
8.8 mi away · emergency room
3 of 3
care shortages: primary care, dental, mental health
Full pageIrwin Township’s health reportOpen the page
Everyday habitsFewer binge drinkersHospitals & doctors nearby8.8 miles to an ER · Avera Gregory HospitalHow adults are doingMore adults in frequent physical distressEvery CDC estimateBetter than SD on 2 of 26

CDC PLACES 2025 · modeled estimates for adults · CMS · HRSA

Outdoors

Conservation land takes up 1.8% of Irwin Township

The trail network density for Irwin Township comes to 0.8 miles per square mile.

1.8%conserved
Irwin TownshipSouth Dakota townsU.S. towns
Miles of trail per square mile0.8 miles per square mile0.60.4
Conserved land1.8%3.3%4.3%
1.8%
conserved · 413 of 22,791 acres
27 mi
of trails · 0.8 per sq mi
Full pageIrwin Township’s outdoors pageOpen the page
Trail map27 miles of trail, mappedPick a walkPick a walkConserved land1.8% conserved · 413 acres protectedQuestions“Where can I hike in Irwin Township?”

Trails & parks © OpenStreetMap contributors · Conserved land: USGS PAD-US

Keep exploring

Everything we know about Irwin Township

13pages on Irwin Township
The big questions
HealthBetter than SD on 2 of 26 CDC measuresNatural hazardsFEMA risk higher than 69% of U.S. communities · inland flooding
Out and about
Outdoors27 mi of trails · 2% conserved landPlacesLibraryGregory Public LibraryColleges
The story
Town Hall & politicsClimate88° summer highs · 45″ of snow
Day to day
NewsWeatherHandbookTown SquareNeighbors
After high school

Colleges nearby

None within 15 miles of Irwin Township; the nearest are

Sinte Gleska UniversityUniversity or college · Public · Mission53.4 mi$4,714 in-state tuitionMitchell Technical CollegeCommunity college · Public · Mitchell82.6 mi$7,524 in-state tuition

Prices by family income, graduation and earnings →

Questions about Irwin Township

Short answers, built from the data on this page.

Is Irwin Township, SD a good place to live?

Irwin Township has fewer than 1,000 residents, too few for fair grades; the figures below are still real.