Sunnyside township Flag

Sunnyside township

County Seat:
No
Area (mi²):
38.862
State:
South Dakota

Sunnyside township is located in Pennington County, South Dakota. Sunnyside township has a 2026 population of 12. Sunnyside township is currently declining at a rate of -7.69% annually and its population has decreased by -20% since the most recent census, which recorded a population of 15 in 2020.

The median age in Sunnyside township is 40.7 years: 43.2 years for males, and 40.5 years for females. For every 100 females there are 142.3 males.

12
Total Population
0.31
Density (mi²)
-1 -7.69%
Growth

Sunnyside township Population

Sunnyside township Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202612-1-7.69%
202513-1-7.14%
202414-1-6.67%
20231500%
20221500%
20211500%
20201500%
20191900%
20181900%
201719318.75%
20161600%
20151600%
20141600%
20131600%
20121600%
20111600%
20101600%

Median Age

Overall: 40.7 years
Female: 40.5 years
Male: 43.2 years

Sunnyside township Adults

There are 37 adults, (21 of whom are seniors) in Sunnyside township.

Sex Ratio

Female: 26 (41.3%)
Male: 37 (58.7%)

Demographics

The racial composition of Sunnyside township includes 100% White, and smaller percentages for and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White63100%
Race
Population ↓
Percentage (of total)
White63100%

Sunnyside township Marital Status

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)