Seneca, SD
Population 26 · South Dakota
About Seneca, SD
Seneca is a small community in South Dakota with a population of 26 residents. The median household income is $40,750 per year, which is below the national average. The median age in Seneca is 62.8 years.
Housing in Seneca has a median home value of $28,500 and median monthly rent of $0. Of the 30 total housing units, the majority are owner-occupied, with 17 owner-occupied and 0 renter-occupied units.
The unemployment rate in Seneca is 0.0% and the poverty rate is 19.2%. 0.0% of residents hold a bachelor's degree or higher. The average commute time is 0 minutes.
How Seneca Ranks in South Dakota
Cost of Living in Seneca, SD
Compared to national averages, Seneca has a median household income of $40,750 (46% below the national median of $75,149). Home values average $28,500, which is 88% below the national median. Monthly rent at $0 is 100% below the US average of $1,163. Within South Dakota, Seneca's income is 37% below the state average of $64,650, and home values are 80% below the state median of $143,757.
Why Live in Seneca, SD?
Seneca offers affordable housing with a median home value of $28,500, below the US average of $244,900, and rent that’s lower than the national average at $0/month, and a strong job market with an unemployment rate of just 0.0%. Additionally, the city features short commute times averaging just 0 minutes.
Potential considerations include median household income ($40,750) that falls below the national average. However, Seneca’s smaller community size offers a quieter lifestyle and tight-knit neighborhoods.
Seneca has a population of 26 with a median age of 62.8 years. Compare Seneca with other cities to see how it stacks up, or explore all cities in South Dakota.
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Data source: US Census Bureau ACS 5-Year Estimates. Last updated: 2026-04-05.
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Frequently Asked Questions about Seneca
What is the population of Seneca, SD?
The population of Seneca, SD is 26 according to the latest Census data.
What is the median household income in Seneca?
The median household income in Seneca, SD is $40,750 per year.
What is the median home value in Seneca?
The median home value in Seneca, SD is $28,500.
What is the average rent in Seneca?
The median monthly rent in Seneca, SD is $0.
What is the unemployment rate in Seneca?
The unemployment rate in Seneca, SD is 0.0%.