Seneca, Kansas Demographics & Population 2026
During the 2020–2024 ACS period, Seneca, Kansas had a total population of 2,090, the 122nd largest city in Kansas, with a median household income of $76,750, which is 3% higher than the state average. The poverty rate is 8.0%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Near full employment with an unemployment rate of just 0.9%.
Seneca Quick Facts
How Seneca Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 2,139 | 2,090 | -2.3% |
| Median household income | $70,221 | $76,750 | +9.3% |
| Median home value | $217,000 | $235,100 | +8.3% |
How Seneca Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A less diverse community where one racial or ethnic group represents a large majority.
State average: 45 | National average: 61
Education
Educational Attainment (Adults 25+)
Seneca Rankings in Kansas
Explore Kansas Rankings
Other Cities in Nemaha County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Sabetha | 2,471 | $70,464 | 10.6% | $170,800 |
| Centralia | 501 | $67,188 | 5.5% | $86,400 |
| Wetmore | 342 | $69,375 | 5.9% | $88,400 |
| Corning | 187 | $93,750 | 8.0% | $135,000 |
| Oneida | 137 | $65,000 | 24.8% | $45,000 |
| Bern | 136 | $62,500 | 5.1% | $127,300 |
| Goff | 133 | N/A | 68.4% | $50,000 |
| Baileyville | 126 | N/A | 0.0% | $447,700 |
| St. Benedict | 36 | N/A | 30.6% | N/A |
| Kelly | 1 | N/A | 0.0% | N/A |
Cities Similar to Seneca
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Oakley | 2,009 | $77,065 | $120,000 | 25.3% | 16.2% |
| Ellis | 2,189 | $73,000 | $155,500 | 31.7% | 21.2% |
| Herington | 2,164 | $70,574 | $85,200 | 23.4% | 7.6% |
| North Newton | 2,155 | $87,402 | $217,800 | 47.8% | 4.8% |
| Wellsville | 2,216 | $83,750 | $180,000 | 21.5% | 8.0% |
Population Overview
Seneca is a small community located in Kansas, within Nemaha County. The total population is 2,090. It ranks as the 122nd most populous out of 721 Census-designated places in Kansas.
Age Demographics
The median age in Seneca is 51.8 years. This is 39% higher than the state median of 37.4 years. 15.5% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.
Economy, Income & Housing
The median household income in Seneca is $76,750. This is 3% higher than the state median of $74,275. It is also 5% lower than the national median of $80,734. The poverty rate stands at 8.0%. This is 29% lower than the state poverty rate of 11.3%. The unemployment rate is 0.9%. This is 77% lower than the state rate of 3.9%. The median home value is $235,100. Housing costs are 8% higher than the state median of $217,200. The home-value-to-income ratio is 3.1x. 79.3% of occupied housing units are owner-occupied. This homeownership rate is 18% higher than the state average of 67.2%.
Race & Ethnicity
Seneca has a predominantly White (non-Hispanic) population, comprising 95.7% of all residents. Hispanic or Latino residents account for 2.6%. The Black or African American population (0.2%) is well below the state average of 5.1%. The Hispanic or Latino population (2.6%) is well below the state average of 13.6%.
Education
23.6% of residents aged 25 and older hold a bachelor's degree or higher. This is 34% lower than the state rate of 35.6%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 95.5%.
Data Sources & Methodology
All demographic data for Seneca, Kansas is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Kansas state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 721 Census-designated places in Kansas. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Seneca, Kansas?
Seneca, Kansas has a population of 2,090 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Seneca, KS?
The median household income in Seneca is $76,750, which is 5% lower than the national median of $80,734.
What is the poverty rate in Seneca, KS?
The poverty rate in Seneca is 8.0%. This means approximately 159 residents live below the federal poverty line.
What is the racial makeup of Seneca, Kansas?
Seneca's population is 95.7% White, 0.2% Black, 2.6% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Seneca, KS?
The median home value in Seneca is $235,100. The home-value-to-income ratio is 3.1x.
How educated is Seneca, Kansas?
23.6% of adults (25+) in Seneca hold a bachelor's degree or higher, and 5.2% hold a graduate or professional degree.