Ontario township Flag

Ontario township

County:
Hand County
County Seat:
No
Area (mi²):
35.68
State:
South Dakota

Ontario township is located in Hand County, South Dakota. Ontario township has a 2026 population of 21. Ontario township is currently declining at a rate of -4.55% annually and its population has decreased by -12.5% since the most recent census, which recorded a population of 24 in 2020.

The median age in Ontario township is 67.1 years: 46.8 years for males, and 67.2 years for females. For every 100 females there are 186.4 males.

21
Total Population
0.59
Density (mi²)
-1 -4.55%
Growth

Ontario township Population

Ontario township Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202621-1-4.55%
202522-1-4.35%
202423-1-4.17%
20232400%
20222400%
20212400%
20202400%
20193000%
201830-1-3.23%
20173100%
20163100%
20153113.33%
20143000%
20133000%
201230-1-3.23%
20113100%
20103100%

Median Age

Overall: 67.1 years
Female: 67.2 years
Male: 46.8 years

Ontario township Adults

There are 50 adults, (33 of whom are seniors) in Ontario township.

Sex Ratio

Female: 22 (34.9%)
Male: 41 (65.1%)

Demographics

The racial composition of Ontario 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%

Ontario 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)