Seneca, WI demographics:
population, income, and more

Total population
372
10.7% year-over-year change
Median household income
$62,143/yr
5.3% year-over-year change
Housing units
112
13.1% year-over-year change

Seneca population

How many people live in Seneca

Seneca is home to 372 residents, according to the most recent Census data. Gender-wise, 51.3% of Seneca locals are male, and 48.7% are female.

Total population
372
10.7% year-over-year change
Gender ratio
Male
51.3%
191
Female
48.7%
181
Value Percent YoY change
Male 191 51.3% 12.3%
Female 181 48.7% 9.0%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Seneca is 36, with the population distributed as follows: about 26.9% are children under 15, then 7.3% are in the 15 to 24 age group. Adults between 25 and 44 make up 34.1% of the population, while another 20.4% fall into the 45 to 64 bracket. Finally, around 11.3% are 65 or older.

Median age
35.9
Age breakdown
Under 15
26.9%
15 to 24
7.3%
25 to 44
34.1%
45 to 64
20.4%
Over 65
11.3%
Value Percent YoY change
Under 15 100 26.9% 19.1%
15 to 24 27 7.3% 80.0%
25 to 44 127 34.1% 4.1%
45 to 64 76 20.4% 1.3%
Over 65 42 11.3% 5.0%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

There’s also a share of 0.5% that includes residents with two or more races.

Citizenship
U.S.-born citizens
100%
Non-U.S.-born citizens
0%
Non-citizens
0%
Value Percent YoY change
U.S.-born citizens 372 100% 10.7%
Racial breakdown
White
97%
Black or African American
0%
American Indian and Alaska Native
0%
Asian
2.4%
Native Hawaiian and other Pacific Islander
0%
Two or more races
0.5%
Other
0%
Value Percent
White 361 97%
Asian 9 2.4%
Two or more races 2 0.5%

Households in Seneca

A peek inside Seneca households

Seneca has 104 households, with an average of 4 members in each. Of these, 70.2% are families, while the remaining 29.8% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
104
5.0% year-over-year change
Average people per household
4
Non-family households
31
Family households
73
Value Percent YoY change
Non-family households 31 29.8% 3.3%
Family households 73 70.2% 5.8%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Seneca

The housing landscape of Seneca

Seneca's housing consists of 112 units, with 88.4% being detached single-family homes ideal for those wanting space. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 11.6% of the housing landscape.

Housing units
112
13.1% year-over-year change
Housing types
Value Percent
1 unit, detached 99 88.4%
Mobile home 13 11.6%
Homes built since 2020
0
% year-over-year change

The age of buildings in Seneca

In Seneca, the median construction year is 1938. Most development happened in the second half of the 20th century.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 64 57.1% 33.3%
Built between 1960 and 1969 4 3.6% -63.6%
Built between 1970 and 1979 10 8.9% 0.0%
Built between 1980 and 1989 17 15.2% 142.9%
Built between 1990 and 1999 5 4.5% -16.7%
Built between 2000 and 2009 5 4.5% N/A
Built between 2010 and 2019 7 6.2% 16.7%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Seneca occupancy rates

Out of the 104 occupied housing units in Seneca, 91.4% are owner-occupied, while 8.6% are lived in by tenants. Meanwhile, 7.1% of all homes on the local market sit vacant.

Occupied housing units
104
5.0% year-over-year change
Occupancy breakdown
Renter occupied
9
Owner occupied
95
Value Percent YoY
change
Renter occupied 9 8.6% 12.5%
Owner occupied 95 91.4% 4.4%
Unoccupied housing units
7.1%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Seneca housing costs

Housing costs in Seneca come to a median of $900 per month, while tenants specifically pay a median gross rent of $1,025.

Median housing costs per month
$900/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Seneca
$1,025/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Seneca

Seneca education at a glance

About 50.4% of the population in Seneca went to high school, while 7.8% pursued college studies. Another 9.7% earned an associate degree and 28.3% hold a bachelor’s. Meanwhile, 3.9% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
High school diploma 130 50.4% -1.5%
College diploma 20 7.8% -23.1%
Associate degree 25 9.7% 66.7%
Bachelor's degree 73 28.3% 10.6%
Graduate degree 10 3.9% 25.0%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Seneca

How much people earn in Seneca

The average annual household income in Seneca was $64,902 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +4.2% change from the previous year. At the same time, the median income stood at $62,143, reflecting a +5.3% shift over the same period.

Average household income in Seneca
$64,902/year
4.2% year-over-year change
Median household income in Seneca
$62,143/year
5.3% year-over-year change

Seneca income by age

In Seneca, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $69,464. Those with someone between 45 and 64 in charge, often well established professionally, earn $61,548 overall. Overall, 97.6% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
25 - 44 $69,464 -11.8%
45 - 64 $61,548 4.4%
Over 65 $26,797 0.6%
Above poverty level
363
Below poverty level
9
Value Percent YoY
change
Above poverty level 363 97.6% 11.0%
Below poverty level 9 2.4% 0.0%

Employment in Seneca

Workforce and job types in Seneca

The job market in Seneca is powered by 159 working residents, spread across a range of industries and roles. 51.6% of the working population are employed in professional or administrative positions, while 48.4% are in hands-on or service-based jobs. Also, 2.5% run their own businesses, 53.5% are employed by private companies, and 39.6% work in the public sector.

Workforce demographics

Working population
159
20.4% year-over-year change
White collar
82
Blue collar
77
Value Percent YoY change
White collar 82 51.6% 43.9%
Blue collar 77 48.4% 2.7%
Employer type
Self employees
2.5%
Private companies
53.5%
Governmental workers
39.6%
Not for profit companies
4.4%
Value Percent YoY change
Self employees 4 2.5% 0.0%
Private companies 85 53.5% 4.9%
Governmental workers 63 39.6% 53.7%
Not for profit companies 7 4.4% 16.7%
Unemployment rate
4.2%
16.7% year-over-year change

Available workforce

The unemployment rate in Seneca stands at 4.2%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in Seneca

How people get around in Seneca

Commuting methods vary: 94.2% of residents travel by personal vehicle and 1.3% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Means of transportation
Value Percent YoY change
Car 147 94.2% 21.5%
Walk 2 1.3% -33.3%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Seneca by zipcode?

Zipcode Population Number of households Median income Average income
54654 168 63 $68,304 $63,071

Explore more communities

FAQs about Seneca demographics 

What is the total population of Seneca?

Seneca has a total population of 372 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by +10.7% compared to a year ago.

What is the gender ratio in Seneca?

The gender ratio in Seneca is as follows:
  • 51.3% males (191 residents)
  • 48.7% females (181 residents)

What is the median age in Seneca?

The median age in Seneca is 35.9.

What is the age distribution of the population in Seneca?

The age distribution in Seneca is as follows:
  • Under 15: 26.9% (100 residents)
  • Ages 15-24: 7.3% (27 residents)
  • Ages 25-44: 34.1% (127 residents)
  • Ages 45-64: 20.4% (76 residents)
  • Over 65: 11.3% (42 residents)

What is the racial and ethnic makeup of Seneca?

The racial and ethnic makeup of Seneca is as follows:
  • White: 97% (361 residents)
  • Black or African American: 0% (0 residents)
  • American Indian and Alaska Native: 0% (0 residents)
  • Asian: 2.4% (9 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (0 residents)
  • Two or More Races: 0.5% (2 residents)
  • Other: 0% (0 residents)

What percentage of the population in Seneca are U.S.-born citizens?

U.S.-born citizens represent 100% of the population in Seneca.

How many housing units are there in Seneca?

There are 112 housing units in Seneca, reflecting a +13.1% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Seneca and what is the average household size?

Seneca has a total of 104 households, with an average of 4 people in each.

What is the median household income in Seneca?

Seneca has a median household income of $62,143, representing a +5.3% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Seneca?

The employment rate is 95.8% in Seneca, with a workforce of 159 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 51.6% (82 residents)
  • Blue-collar workers: 48.4% (77 residents)

Places of employment:
  • Self-employed: 2.5% (4 residents)
  • Private companies: 53.5% (85 residents)
  • Governmental workers: 39.6% (63 residents)
  • Not-for-profit companies: 4.4% (7 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025