Eureka, IL Profile: Facts, Map & Data


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Eureka, Illinois - Basic Facts

The City of Eureka had a population of 5,340 as of July 1, 2016. Eureka ranks in the upper quartile for Population Density when compared to the other cities, towns and Census Designated Places (CDPs) in Illinois. See peer rankings below.

The primary coordinate point for Eureka is located at latitude 40.714 and longitude -89.277 in Woodford County. The formal boundaries for the City of Eureka (see map below) encompass a land area of 2.67 sq. miles and a water area of 0.05 sq. miles. Woodford County is in the Central time zone (GMT -6). The elevation is 768 feet.

The City of Eureka (GNIS ID: 2394706) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

The City of Eureka is located within Township of Olio, a minor civil division (MCD) of Woodford County.

Beneath the boundary map are tables with Eureka population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2016.

Neighborhood Data

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City of Eureka, IL Boundary Map

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Boundary Maps: Township of Olio | Woodford County | Illinois Counties

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Eureka, IL Data & Demographics (As of July 1, 2016)


Total Population 5,340
Population in Households 4,798
Population in Familes 4,048
Population in Group Qrtrs 542
Population Density1 1,997
Diversity Index2 13


Total Households 1,895
Average Household Size 2.53
Family Households 1,304
Average Family Size 3


Total Housing Units 2,035 (100%)
Owner Occupied HU 1,336 (65.7%)
Renter Occupied HU 559 (27.5%)
Vacant Housing Units 140 ( 6.9%)
Median Home Value $137,392
Average Home Value $145,768


Median Household Income $51,812
Average Household Income $66,723
Per Capita Income $27,083
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.42% 0.41%
Households 0.45% 0.43%
Families 0.76% 0.35%
Median Household Income   -0.17%
Per Capita Income   0.71%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.

Eureka, IL - Peer Comparisons by Rank and Percentile

The table below compares Eureka to the other 1,368 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2016 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 330 76th
Population Density1 # 278 80th
Diversity Index2 # 667 51st
Median Household Income # 700 49th
Per Capita Income # 552 60th

Additional comparisons and rankings can be made with a VERY EASY TO USE Illinois Census Data Comparison Tool.

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