Eureka

County:: Lincoln County
County Seat:: No
Area (mi²):: 1.326
State:: Montana

Eureka is a town located in Lincoln County, Montana. Eureka has a 2025 population of 1,629. Eureka is currently growing at a rate of 3.04% annually and its population has increased by 17.36% since the most recent census, which recorded a population of 1,388 in 2020.

The average household income in Eureka is $58,947 with a poverty rate of 29.35%.The median age in Eureka is 37.7 years: 41.6 years for males, and 35.3 years for females.

Demographics

The racial composition of Eureka includes 87.95% White, and smaller percentages for Native American and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	1,767	87.95%
Two or more races	201	10%
Native American	41	2.04%

Eureka Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Eureka's average per capita income is $0. Household income levels show a median of $43,750. The poverty rate stands at 29.35%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Married Families	$53,819	-
Households	$43,750	$58,947
Families	$42,238	$57,905
Non Families	$26,818	$44,451

$0

Average Income

$43,750

Median Household Income

29.35%

Poverty Rate