South Dakota›Pennington County

Sunnyside TownshipSD

A town of 14.

Population

2025 Census estimate · −6.7% since 2020

Median age

40.7

years

Is Sunnyside Township a good place to live?

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

Small town

14 people, and everyone knows the way

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

Nearby towns

Smithville Township · 6 mi Ash Township · 6 mi Cedar Butte Township · 6 mi Elm Springs Township · 7 mi Huron Township · 9 mi Shyne Township · 10 mi

Smithville TownshipAsh TownshipCedar Butte TownshipShyne TownshipSunnyside Township

Getting set up

Moving to Sunnyside Township: who provides what

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

The full setup list →

PowerBlack Hills Energy15.1¢/kWh · EIA 2025HIFLD · EIA

WaterWr/Lj - Creighton Project water systemNo health-based violations in 5 years · EPAEPA

Internet1 providers100% of addresses get 100/20 MbpsFCC

Trash & dumpNot on file yetWe don’t have Sunnyside Township’s trash rules yet

SchoolsWall School District 51-5Which 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 herePennington County AuditorPennington County; contacts on the Handbook page.FVAP, Sep 2025

ZIP code5779057790 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 Sunnyside Township.

Natural hazards

High risk in Sunnyside Township, with inland flooding at the top

Sunnyside Township’s FEMA hazard score is 74 of 100, above both the South Dakota town median (54 of 100) and the median of U.S. towns (44 of 100). Expected losses in Sunnyside Township break down as 52% from inland flooding and 15% from wildfires.

74risk score of 100

FEMA risk score

Inland floodingWildfireCold waves

Full pageSunnyside Township’s hazards pageOpen the page

What it facesHigh risk Flood claims0 paid flood claims · No paid flood claims on record Past disasters19 disaster declarations · Declared for the county Get ready2.1 events a year, on average · Ready for inland flooding

FEMA National Risk Index · OpenFEMA

Climate

Sunnyside Township stands out in South Dakota and nationally, with a typical July afternoon hotter than most

Winters in Sunnyside Township are cold, snowy and summers warm, with very little rain. July afternoons reach 88°, January nights drop to 11° and about 37 inches of snow falls in a winter.

37″snow a winter

Typical low → high °F

Winter13–36°

Spring33–59°

Summer57–85°

Fall35–63°

Oct 3

typical first frost

May 8

typical last frost

+1.1°

vs. the 20th-century average

Full pageSunnyside Township’s climate pageOpen the page

A year of weatherJuly highs 88°, January lows 11°Rain & snow37″ of snow a winter · 18 inches of rain and snow a year Heating & coolingMostly a heating bill Then and now+1.1° vs. the 20th century · Warmer than the 20th-century average

NOAA U.S. Climate Normals, 1991–2020

Health

How healthy Sunnyside Township is

Sunnyside Township: 31% of adults sleep under 7 hours, against 30% in South Dakota’s towns and 36% across U.S. towns. Of 26 CDC measures, Sunnyside Township beats the South Dakota average on 2 and trails it on 5. 13% of adults have diabetes in the town.

	Sunnyside Township	South Dakota towns	U.S. towns
High blood pressure (CDC PLACES)	38%	31%	35%
Diabetes (CDC PLACES)	13%	10%	12%
Frequent mental distress (CDC PLACES)	15%	15%	17%
Sleep under 7 hours (CDC PLACES)	31%	30%	36%