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Irwin

A township of 33 people in Tripp County, South Dakota

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Town hallWanted · be the first Main streetWanted · be the first The libraryWanted · be the first Add a photoStart the Irwin album

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Now in Irwin

What’s happening this week

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Around town

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Around town

The places and views that make it Irwin

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The Irwin album

0 of 12 shotsNeighbors document Irwin together

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Outdoors in Irwin

Parks & trails →

Conserved land1.8%413 of 22,791 acres

Trails27 mi0.8 mi per sq mi

Parks & preserves0named on the map

Know a trail or park that’s missing? Anyone can add it to OpenStreetMap, and it shows up here on the next refresh.

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

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Know Irwin

The town at a glance, and the guide to how things work

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Living in Irwin

Health in Irwin

Compared with South Dakota

2better than SD·9worse

of 26 measures CDC estimates. The other 15 are too close to call.

Conditions 8▼ 4 close Habits all close Care 2▲ 5 close Mind 1▼ 2 close

BetterToo close to callWorse

What stands out

81%More adults treating high blood pressureSD 75.9% · better 86.9%More adults getting cholesterol checkedSD 84.8% · better 9.6%More adults with heart diseaseSD 6.8% · worse

Care nearby

Avera Gregory HospitalGregory · 8.8 mi · ER · rural critical access

Access Health - ChamberlainChamberlain · 36 mi · sliding-scale fees

Primary careShortage · county-wide

DentalShortage · county-wide

Mental healthShortage · county-wide

CDC PLACES 2025 · modeled estimates for adults · ZIP code 57529 · CMS · HRSAHealth in Irwin →

Natural hazards in Irwin

High

Expected storm and flood damage is higher than in 69% of U.S. communities.

🌊 Inland flooding🥶 Cold waves🌪️ Tornadoes

0Does Irwin flood?no paid flood claims on record NoneDisasters that paid out hereof 18 declared for Tripp County MapIrwin vs. its neighborsnearby towns shaded by rating

FEMA National Risk Index December 2025 · OpenFEMANatural hazards in Irwin →

Climate in Irwin

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Irwin has cold, snowy winters and warm summers. A typical July afternoon reaches 88°, a January night drops to 11°, and about 45 inches of snow falls in a normal winter.

35° / 14°Winter

59° / 34°Spring

84° / 59°Summer

62° / 37°Fall

How much snow does Irwin get?About 45 inches a winter.Rain & snow →When is the first frost?Around Oct 3, with the last in spring around May 6.Frost dates →Is it warmer than it used to be?+1.3° vs. the 20th century.Then & now →

NOAA U.S. Climate Normals, 1991–2020Climate in Irwin →

Libraries near Irwin

Nearest: Gregory Public LibraryGregory · 8.1 miles · 26 hrs a week

Where Irwin is

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Imported town boundary

South Dakota · SD · Tripp CountyTown boundary on OpenStreetMap →

Around town

Bordering towns

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Irwin Edens Sully Elliston Colome

EEdens NSully SElliston WColome

Compare side by side:Irwin vs Edens Irwin vs Sully Irwin vs Elliston Irwin vs Colome

How things work in Irwin

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Town hall & decisionsTrash, recycling & yard wasteUtilities & servicesStreets, parking & getting aroundSafety & preparednessSchools & learningParks, sports & recreationHealth & emergency care