Eureka Flag

Eureka

County:
Woodford County
County Seat:
No
Area (mi²):
2.737
State:
Illinois

Eureka is a city located in Woodford County, Illinois. Eureka has a 2026 population of 5,175. Eureka is currently declining at a rate of -0.14% annually and its population has decreased by -0.81% since the most recent census, which recorded a population of 5,217 in 2020.

The median household income in Eureka is $56,048 with a poverty rate of 10.81%. The median age in Eureka is 42.2 years: 38.3 years for males, and 53 years for females. For every 100 females there are 82.8 males.

5.2K
Total Population
1,891
Density (mi²)
-7 -0.14%
Growth

Eureka Population

Eureka Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20265,175-7-0.14%
20255,182-7-0.13%
20245,189-18-0.35%
20235,207180.35%
20225,18930.06%
20215,186-39-0.75%
20205,217-52-0.99%
20195,269-24-0.45%
20185,293-34-0.64%
20175,327-34-0.63%
20165,361280.53%
20155,333-30-0.56%
20145,363-13-0.24%
20135,37610.02%
20125,375-9-0.17%
20115,384390.73%
20105,345500.94%
20004,8714369.83%
19904,4351293%
19804,3061,27842.21%
19703,02849019.31%
19602,53800%

Median Age

Overall: 42.2 years
Female: 53 years
Male: 38.3 years

Eureka Adults

There are 4,069 adults, (1,222 of whom are seniors) in Eureka.

Sex Ratio

Female: 2,739 (54.7%)
Male: 2,268 (45.3%)

Demographics

The racial composition of Eureka includes 93.31% White, and smaller percentages for Two or more races, Black or African American, other race, Asian and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White4,67293.31%
Two or more races1332.66%
Black or African American891.78%
Other race891.78%
Asian240.48%
Race
Population ↓
Percentage (of total)
White631.26%
Other race490.98%
Two or more races140.28%
Asian120.24%
Race
Population ↓
Percentage (of total)
White4,60992.05%
Two or more races1192.38%
Black or African American891.78%
Other race400.8%
Asian120.24%

Eureka Marital Status

Economics and Income Statistics

Eureka 's average per capita income is $57,500. Household income levels show a median of $56,048. The poverty rate stands at 10.81%.

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$113,971-
Families$102,875$108,314
Households$56,048$72,678
Non Families$24,855$33,659

$57,500

Average Income

$56,048

Median Household Income

10.81%

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)