Seneca Flag

Seneca

County:
Faulk County
County Seat:
No
Area (mi²):
0.419
State:
South Dakota

Seneca is a town located in Faulk County, South Dakota. Seneca has a 2026 population of 23. Seneca is currently declining at a rate of 0% annually and its population has increased by 4.55% since the most recent census, which recorded a population of 22 in 2020.

The median age in Seneca is 67.3 years: 57.9 years for males, and 70.8 years for females. For every 100 females there are 214.3 males.

23
Total Population
55
Density (mi²)

Seneca Population

Seneca Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20262300%
20252300%
20242300%
20232314.55%
20222200%
20212200%
20202200%
20193700%
20183700%
20173700%
20163700%
20153700%
201437-1-2.63%
20133800%
20123800%
20113800%
20103800%

Median Age

Overall: 67.3 years
Female: 70.8 years
Male: 57.9 years

Seneca Adults

There are 22 adults, (12 of whom are seniors) in Seneca.

Sex Ratio

Female: 7 (31.8%)
Male: 15 (68.2%)

Demographics

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

Population by Race

Race
Population ↓
Percentage (of total)
White22100%
Race
Population ↓
Percentage (of total)
White22100%

Seneca 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)