Eureka Flag

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 2026 population of 1,646. Eureka is currently growing at a rate of 2.68% annually and its population has increased by 18.42% since the most recent census, which recorded a population of 1,390 in 2020.

The median household income in Eureka is $38,750 with a poverty rate of 31.32%. The median age in Eureka is 42.4 years: 42.8 years for males, and 42.1 years for females. For every 100 females there are 70.5 males.

1.6K
Total Population
1,241
Density (mi²)
43 2.68%
Growth

Eureka Population

Eureka Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20261,646432.68%
20251,603422.69%
20241,561241.56%
20231,537261.72%
20221,511634.35%
20211,448584.17%
20201,39040.29%
20191,429171.2%
20181,412181.29%
20171,394191.38%
20161,375181.33%
20151,357-8-0.59%
20141,365-15-1.09%
20131,380-4-0.29%
20121,384-11-0.79%
20111,39535834.52%
20101,403-2-0.14%

Median Age

Overall: 42.4 years
Female: 42.1 years
Male: 42.8 years

Eureka Adults

There are 1,295 adults, (370 of whom are seniors) in Eureka.

Sex Ratio

Female: 1,079 (58.6%)
Male: 761 (41.4%)

Demographics

The racial composition of Eureka includes 89.13% White, and smaller percentages for Native American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White1,64089.13%
Two or more races1719.29%
Native American291.58%
Race
Population ↓
Percentage (of total)
Two or more races532.88%
Race
Population ↓
Percentage (of total)
White1,64089.13%
Two or more races1186.41%
Native American291.58%

Eureka Marital Status

Economics and Income Statistics

Eureka 's average per capita income is $30,688. Household income levels show a median of $38,750. The poverty rate stands at 31.32%.

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$56,346-
Families$40,000$61,905
Households$38,750$59,561
Non Families$36,429$48,009

$30,688

Average Income

$38,750

Median Household Income

31.32%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)