St. CharlesSD

The town was settled in 1906 and has 6 residents today.

Census survey, 2020–24

Is St. Charles a good place to live?

50% of residents live below the poverty line in St. Charles, above both the South Dakota town median (9.5%) and the median of U.S. towns (9.6%). Of the 36 South Dakota towns we compare, none has a higher age of the median resident than St. Charles. St. Charles has fewer than 1,000 residents, too few for fair grades; the figures below are still real.

Small town

6 people, and everyone knows the way

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

Nearby towns

Herrick · 5 mi Pleasant Valley Township · 5 mi Schriever Township · 7 mi Bonesteel · 8 mi Naper · 9 mi Basin Township · 11 mi

Getting set up

Moving to St. Charles: who provides what

St. Charles is unincorporated, so Gregory County and regional agencies provide most services.

PowerRosebud Electric Coop11.9¢/kWh · EIA 2025HIFLD · EIA

WaterTripp County Water User DistrictNo health-based violations in 5 years · EPAEPA

Internet2 providers77% of addresses get 100/20 MbpsFCC

Trash & county servicesGregory CountyGregory County provides services here

SchoolsSouth Central School District 26-5Which 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 hereGregory County AuditorGregory County; contacts on the Handbook page.FVAP, Jul 2023

ZIP code5757157571 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 St. Charles.

Climate

Four seasons and pleasant summers: that is St. Charles’ year

The seasons in St. Charles bring cold, snowy winters and warm summers. Summer afternoons peak near 86° in July, and January nights bottom out around 12°; snowfall runs to about 37 inches a winter.

37″snow a winter

Typical low → high °F

Winter15–34°

Spring35–58°

Summer60–83°

Fall38–61°

Oct 10

typical first frost

May 3

typical last frost

+0.9°

vs. the 20th-century average

Full pageSt. Charles’ climate pageOpen the full Climate page

A year of weatherJuly highs 86°, January lows 12°Rain & snow37″ of snow a winter · 25 inches of rain and snow a year Heating & coolingMostly a heating bill Then and now+0.9° vs. the 20th century · Warmer than the 20th-century average

NOAA U.S. Climate Normals, 1991–2020

Natural hazards

The biggest natural risk in St. Charles is cold waves, at a moderate overall level

FEMA puts 43% of St. Charles’s expected hazard losses down to cold waves, and 30% to inland flooding. On expected storm and flood damage, St. Charles sits below 57% of U.S. communities.

43risk score of 100

FEMA risk score

Cold wavesInland floodingTornadoes

Full pageSt. Charles’ hazards pageOpen the full Hazards page

What it facesModerate risk Flood claims0 paid flood claims · No paid flood claims on record Past disasters19 disaster declarations · Declared for the county Get ready5.6 events a year, on average · Ready for cold waves

FEMA National Risk Index · OpenFEMA

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