Eureka, MT demographics:
population, income, and more

Total population
1,840
-8.4% year-over-year change
Median household income
$38,750/yr
-11.4% year-over-year change
Housing units
664
-4.3% year-over-year change

Eureka population

How many people live in Eureka

Eureka is home to 1,840 residents, according to the most recent Census data. Gender-wise, 41.4% of Eureka locals are male, and 58.6% are female.

Total population
1,840
-8.4% year-over-year change
Gender ratio
Male
41.4%
761
Female
58.6%
1,079
Value Percent YoY change
Male 761 41.4% -11.4%
Female 1,079 58.6% -6.2%
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 Eureka is 42, with the population distributed as follows: about 22.7% are children under 15, then 10.7% are in the 15 to 24 age group. Adults between 25 and 44 make up 23.6% of the population, while another 22.9% fall into the 45 to 64 bracket. Finally, around 20.1% are 65 or older.

Median age
42.4
Age breakdown
Under 15
22.7%
15 to 24
10.7%
25 to 44
23.6%
45 to 64
22.9%
Over 65
20.1%
Value Percent YoY change
Under 15 417 22.7% -19.2%
15 to 24 197 10.7% 2.1%
25 to 44 435 23.6% -23.6%
45 to 64 421 22.9% 0.5%
Over 65 370 20.1% 18.6%
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

In Eureka, 97.8% of the population are US-born citizens, while 1.2% have gained naturalized citizenship. At the same time, 1% of residents are non-citizens. There’s also a share of 9.3% that includes residents with two or more races.

Citizenship
U.S.-born citizens
97.8%
Non-U.S.-born citizens
1.2%
Non-citizens
1%
Value Percent YoY change
U.S.-born citizens 1,799 97.8% -7.3%
Non-U.S.-born citizens 23 1.2% -52.1%
Non-citizens 18 1% -10.0%
Racial breakdown
White
89.1%
Black or African American
0%
American Indian and Alaska Native
1.6%
Asian
0%
Native Hawaiian and other Pacific Islander
0%
Two or more races
9.3%
Other
0%
Value Percent
White 1,640 89.1%
American Indian and Alaska Native 29 1.6%
Two or more races 171 9.3%

Households in Eureka

A peek inside Eureka households

Eureka has 610 households, with an average of 3 members in each. Of these, 63.6% are families, while the remaining 36.4% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
610
-2.4% year-over-year change
Average people per household
3
Non-family households
222
Family households
388
Value Percent YoY change
Non-family households 222 36.4% 3.7%
Family households 388 63.6% -5.6%
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 Eureka

The housing landscape of Eureka

Eureka's housing consists of 664 units, with 62% 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 31.6% of the housing landscape.

Housing units
664
-4.3% year-over-year change
Housing types
Value Percent
1 unit, detached 412 62%
2 units 13 2%
3 or 4 units 29 4.4%
Mobile home 210 31.6%
Homes built since 2020
0
-100.0% year-over-year change

The age of buildings in Eureka

In Eureka, the median construction year is 1974. About 18.2% of homes were built before the 1940s, with another 0.8% going up by 1949. 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 121 18.2% 89.1%
Built between 1940 and 1949 5 0.8% -77.3%
Built between 1950 and 1959 81 12.2% -31.4%
Built between 1960 and 1969 46 6.9% 91.7%
Built between 1970 and 1979 210 31.6% 0.0%
Built between 1980 and 1989 36 5.4% -16.3%
Built between 1990 and 1999 55 8.3% -28.6%
Built between 2000 and 2009 27 4.1% -15.6%
Built between 2010 and 2019 83 12.5% 10.7%
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.

Eureka occupancy rates

Out of the 610 occupied housing units in Eureka, 78.5% are owner-occupied, while 21.5% are lived in by tenants. Meanwhile, 8.1% of all homes on the local market sit vacant.

Occupied housing units
610
-2.4% year-over-year change
Occupancy breakdown
Renter occupied
131
Owner occupied
479
Value Percent YoY
change
Renter occupied 131 21.5% -2.2%
Owner occupied 479 78.5% -2.4%
Unoccupied housing units
8.1%
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.

Eureka housing costs

Housing costs in Eureka come to a median of $608 per month, while tenants specifically pay a median gross rent of $1,038.

Median housing costs per month
$608/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 Eureka
$1,038/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 Eureka

Eureka education at a glance

About 55.7% of the population in Eureka went to high school, while 26.2% pursued college studies. Another 7.3% earned an associate degree and 4.7% hold a bachelor’s. Meanwhile, 1.7% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 57 4.4% 5.6%
High school diploma 721 55.7% -1.5%
College diploma 340 26.2% -11.0%
Associate degree 94 7.3% -2.1%
Bachelor's degree 61 4.7% -15.3%
Graduate degree 22 1.7% -8.3%
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 Eureka

How much people earn in Eureka

The average annual household income in Eureka was $59,561 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +1% change from the previous year. At the same time, the median income stood at $38,750, reflecting a -11.4% shift over the same period.

Average household income in Eureka
$59,561/year
1.0% year-over-year change
Median household income in Eureka
$38,750/year
-11.4% year-over-year change

Eureka income by age

In Eureka, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $43,462. Those with someone between 45 and 64 in charge, often well established professionally, earn $74,167 overall. Overall, 68.7% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
25 - 44 $43,462 N/A
45 - 64 $74,167 2.6%
Over 65 $29,762 -4.0%
Above poverty level
1,241
Below poverty level
566
Value Percent YoY
change
Above poverty level 1,241 68.7% -11.0%
Below poverty level 566 31.3% -2.2%

Employment in Eureka

Workforce and job types in Eureka

The job market in Eureka is powered by 776 working residents, spread across a range of industries and roles. 66.4% of the working population are employed in professional or administrative positions, while 33.6% are in hands-on or service-based jobs. Also, 24.1% run their own businesses, 57.5% are employed by private companies, and 11.6% work in the public sector.

Workforce demographics

Working population
776
-10.2% year-over-year change
White collar
515
Blue collar
261
Value Percent YoY change
White collar 515 66.4% -9.5%
Blue collar 261 33.6% -11.5%
Employer type
Self employees
24.1%
Private companies
57.5%
Governmental workers
11.6%
Not for profit companies
6.8%
Value Percent YoY change
Self employees 187 24.1% -15.4%
Private companies 446 57.5% -2.4%
Governmental workers 90 11.6% -26.2%
Not for profit companies 53 6.8% -17.2%
Unemployment rate
4.2%
-55.3% year-over-year change

Available workforce

The unemployment rate in Eureka 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 Eureka

How people get around in Eureka

Commuting methods vary: 68% of residents travel by personal vehicle and 7.1% 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 509 68% -2.7%
Walk 53 7.1% 89.3%
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 Eureka by zipcode?

Zipcode Population Number of households Median income Average income
59917 4,920 1,969 $50,139 $71,025

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FAQs about Eureka demographics 

What is the total population of Eureka?

Eureka has a total population of 1,840 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 -8.4% compared to a year ago.

What is the gender ratio in Eureka?

The gender ratio in Eureka is as follows:
  • 41.4% males (761 residents)
  • 58.6% females (1,079 residents)

What is the median age in Eureka?

The median age in Eureka is 42.4.

What is the age distribution of the population in Eureka?

The age distribution in Eureka is as follows:
  • Under 15: 22.7% (417 residents)
  • Ages 15-24: 10.7% (197 residents)
  • Ages 25-44: 23.6% (435 residents)
  • Ages 45-64: 22.9% (421 residents)
  • Over 65: 20.1% (370 residents)

What is the racial and ethnic makeup of Eureka?

The racial and ethnic makeup of Eureka is as follows:
  • White: 89.1% (1,640 residents)
  • Black or African American: 0% (0 residents)
  • American Indian and Alaska Native: 1.6% (29 residents)
  • Asian: 0% (0 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (0 residents)
  • Two or More Races: 9.3% (171 residents)
  • Other: 0% (0 residents)

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

U.S.-born citizens represent 97.8% of the population in Eureka.

How many housing units are there in Eureka?

There are 664 housing units in Eureka, reflecting a -4.3% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

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

Eureka has a total of 610 households, with an average of 3 people in each.

What is the median household income in Eureka?

Eureka has a median household income of $38,750, representing a -11.4% shift from the previous year, according to the U.S. Census Bureau.

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

The employment rate is 95.8% in Eureka, with a workforce of 776 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 66.4% (515 residents)
  • Blue-collar workers: 33.6% (261 residents)

Places of employment:
  • Self-employed: 24.1% (187 residents)
  • Private companies: 57.5% (446 residents)
  • Governmental workers: 11.6% (90 residents)
  • Not-for-profit companies: 6.8% (53 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