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CITY

Seneca

South Dakota · 24 residents (2025 est.) · 0.419 sq mi
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The short version

Population has fallen 62% since 2000, a loss of 36 residents. 0% of adults hold a bachelor's degree or higher, below the national rate of 36%. With a median age of 67.3, the population is older than the US median of 38.9. The poverty rate of 27.3% is well above the national figure.

At a glance
Older
median age 67.3
US median: 38.9
Less educated
0% hold a bachelor's degree
US average: 36%
Owner-heavy
100% owner-occupied
US average: 65%
Section 01

Population & growth

Total population
22
−62%since 2000
from 58 in 2000
1990 – 2025
Population density
53 / sq mi
−62%since 2000
from 138 / sq mi in 2000
US average: 281
Median age
67.3
+35%since 2000
from 50.0 in 2000
US average: 38.9

PEP 2025 EST:24 residents (Census Bureau Vintage 2025, released March 2026)

Population, 1990 – 2024
2244668901990201020202024Seneca
202422
1990201020202024
Section 02

Income & economy

Per capita income
$16,150
+52%since 2000
from $10,642 in 2000
US average: $44,673
Households earning $100K+
0.0%
−30.4 ptssince 2009
from 30.4% in 2009
US average: 53.3%
Poverty rate
27.3%
+7.3 ptssince 2000
from 20.0% in 2000
US average: 12.5%
Income inequality (Gini)
0.304
+36%since 2010
from 0.223 in 2010
US average: 0.476
Workforce by industry, 2024
Information50%
US avg: 10.8%
Other services33.3%
US avg: 6.7%
Public administration33.3%
US avg: 4.8%
Finance & insurance16.7%
US avg: 5.9%
Professional, scientific, technical16.7%
US avg: 5.1%
Agriculture, forestry, fishing0%
US avg: 1.6%
Construction0%
US avg: 1.2%
Manufacturing0%
US avg: 0.4%
Wholesale trade0%
US avg: 6.9%
Retail trade0%
US avg: 9.9%
Transportation & warehousing0%
US avg: 2.2%
Education & health services0%
US avg: 0.9%
Arts, entertainment, food0%
US avg: 1.9%
BARS: THIS PLACE · TICKS: US AVERAGE
Section 03

Housing

Owner-occupied
100.0%
+3.6 ptssince 2000
from 96.4% in 2000
0.0% rent
Vacancy rate
50.0%
+29.3 ptssince 2009
from 20.7% in 2009
US average: 10.0%
Owner cost-burdened
15.4%
−2.0 ptssince 2009
from 17.4% in 2009
US average: 22.9%
RELATED:See current rent listings in Seneca on RentDataNow
Section 04

Race & ethnicity

2000
White, non-Hispanic98.3%(57)
Black0%(0)
Hispanic / Latino0%(0)
Asian0%(0)
Other0%
Diversity Score0%(0)
2024
White, non-Hispanic100%(22)
Black0%(0)
Hispanic / Latino0%(0)
Asian0%(0)
Other0%(0)
Diversity Score0%(0)
Diversity Score
0
from 0 in 2000
1990 – 2024
Section 05

Education

Bachelor's degree or higher
0.0%
−15.2 ptssince 2000
from 15.2% in 2000
US average: 35.6%
High school or higher
77.3%
+7.7 ptssince 2000
from 69.6% in 2000
US average: 89.6%
Graduate degree
0.0%
−4.3 ptssince 2000
from 4.3% in 2000
US average: 14.0%
Section 06

Commute & transportation

Drive alone to work
83.3%
−6.0 ptssince 2009
from 89.3% in 2009
US average: 68.9%
Carpooled to work
0.0%
−3.6 ptssince 2009
from 3.6% in 2009
US average: 8.5%
Public transit
0.0%
Unchangedsince 2009
from 0.0% in 2009
US average: 3.2%
Worked from home
0.0%
−7.1 ptssince 2009
from 7.1% in 2009
US average: 15.0%
Walked to work
16.7%
+16.7 ptssince 2009
from 0.0% in 2009
US average: 2.4%
Biked to work
0.0%
Unchangedsince 2009
from 0.0% in 2009
US average: 0.4%
No vehicle available
0.0%
Unchangedsince 2009
from 0.0% in 2009
US average: 8.3%
Section 07

Work & employment

Unemployment rate
0.0%
−14.6 ptssince 2011
from 14.6% in 2011
US average: 5.2%
Labor force participation
27.3%
−56.9 ptssince 2011
from 84.2% in 2011
US average: 63.5%
Self-employed
0.0%
−3.2 ptssince 2009
from 3.2% in 2009
US average: 13.1%
Management & professional
16.7%
−31.7 ptssince 2009
from 48.4% in 2009
US average: 42.5%
Section 08

People & community

Male
68.2%
+18.2 ptssince 2009
from 50.0% in 2009
Female
31.8%
−18.2 ptssince 2009
from 50.0% in 2009
Foreign born
31.8%
+31.8 ptssince 2009
from 0.0% in 2009
US average: 14.1%
Veterans
22.7%
−27.3 ptssince 2009
from 50.0% in 2009
US average: 6.2%
With a disability
45.5%
+31.0 ptssince 2012
from 14.5% in 2012
US average: 13.3%
Uninsured
0.0%
−95.2 ptssince 2013
from 95.2% in 2013
US average: 8.4%
Broadband at home
100.0%
+37.5 ptssince 2017
from 62.5% in 2017
US average: 91.0%
English only at home
68.2%
−31.8 ptssince 2016
from 100.0% in 2016
US average: 77.7%
Spanish at home
31.8%
+31.8 ptssince 2016
from 0.0% in 2016
US average: 13.6%
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Frequently asked

How many people live in Seneca, South Dakota?

Seneca, South Dakota has about 22 residents according to the 2024 American Community Survey.

How educated are people in Seneca, South Dakota?

About 0.0% of adults age 25 and over in Seneca, South Dakota hold a bachelor's degree or higher.

What is the poverty rate in Seneca, South Dakota?

About 27.3% of people in Seneca, South Dakota live below the federal poverty line.

Has Seneca, South Dakota grown since 1990?

Yes, Seneca, South Dakota has shrunk since 1990. The population has lost about 59 residents, a change of about -73 percent over that period.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

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