Plankinton, colloquially known as Plank, is a city in and the county seat of Aurora County, South Dakota, United States. The population was 781 at the 2020 census.

Official town website ↗

From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)

Town numbers

ZIP code57368

Area code605

Living in Plankinton

Health in Plankinton

Compared with South Dakota

≈Just like South Dakota

No difference on any of 26 measures is outside the margin of error.

Conditions all close Habits all close Care all close Mind all close

BetterToo close to callWorse

What stands out

Nothing stands out: Plankinton tracks South Dakota closely.

Care nearby

Avera Queen of PeaceMitchell · 24.4 mi · ER · rural critical access

Horizon Health - Plankinton Medical and DentalPlankinton · 0.9 mi · sliding-scale fees

Primary careNo shortage

DentalNo shortage

Mental healthShortage · county-wide

CDC PLACES 2025 · modeled estimates for adults · ZIP code 57368 · CMS · HRSAHealth in Plankinton →

Natural hazards in Plankinton

Moderate

Expected storm and flood damage is higher than in 48% of U.S. communities.

🥶 Cold waves🌊 Inland flooding🌵 Drought

0Does Plankinton flood?no paid flood claims on record NoneDisasters that paid out hereof 20 declared for Aurora County MapPlankinton vs. its neighborsnearby towns shaded by rating

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

Climate in Plankinton

Full climate →

Plankinton has cold, snowy winters and warm summers. A typical July afternoon reaches 86°, a January night drops to 8°, and about 38 inches of snow falls in a normal winter.

31° / 11°Winter

58° / 34°Spring

84° / 59°Summer

61° / 37°Fall

How much snow does Plankinton get?About 38 inches a winter.Rain & snow →When is the first frost?Around Oct 5, with the last in spring around May 3.Frost dates →Is it warmer than it used to be?+1.1° vs. the 20th century.Then & now →

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

Schools in Plankinton

All Plankinton schools →

B⁺

School Grade B+

The public schools Plankinton’s kids attend outperform 71% of South Dakota’s districts on state tests. Among towns with similar incomes, they rank near the top.

DistrictPlankinton School District 01-1Schools4

Aurora Plains Academy Middle School - 04Middle · Grades 4–8 · 7 students Dakota Reach Middle School - 07Middle · Grades 5–8 · 2 students Aurora Plains Academy High School - 05High · Grades 9–12 · 10 students Dakota Reach - 06High · Grades 9–12 · 5 students

School data from the U.S. Department of Education (NCES, EDFacts). The School Grade is our own summary of state test results, graded within SD. Ratings are from neighbors.