Eureka is a city in Woodford County, Illinois, home to about 5,007 people across 2.7 square miles. Its ZIP code is 61530.
Homes sold for a median of $117 per square foot in the three months ending August 2026, a seller’s market.
Each card is that ZIP code’s whole market, including any part outside Eureka. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Eureka’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Chicago Midway International Airport (MDW)108 miles away |
|---|---|
| Closer regional airport | General Wayne A. Downing Peoria International Airport (PIA)22 miles away |
| Nearest city of 250,000+ | Chicago, IL113 miles away |
Straight-line distances from the center of Eureka; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Eureka had 5,227 residents in the 2020 census, up 7% since 2000.
It’s the 337th largest of 1,450 towns in Illinois by population.
Woodford County grew from 21,822 residents in 1900 to 38,467 in 2020.
Woodford County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 86°F in summer, and winter lows average 17°F. About 37.5 inches of rain and melted snow fall in a typical year, with about 22 inches of snow.
Source: NOAA 1991–2020 climate normals, Congerville 2nw, IL weather station (7 miles away).
8,503 jobs at 793 businesses in Woodford County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2022 (private employers; jobs counted where people work).
41 doctors and other health care providers list an office in Eureka.
Nearest hospitals
Providers with an office here
| Primary care doctors | 7 |
|---|---|
| Specialist doctors | 5 |
| Dentists | 1 |
| Nurse practitioners and physician assistants | 8 |
| Mental health providers | 7 |
| Physical and occupational therapists | 7 |
| Chiropractors | 6 |
| Pharmacies | 1 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (3 nearby)
Grocery stores (1 nearby)
Libraries (2 nearby)
Museums (1 nearby)
Theaters and performance venues (2 nearby)
Counts are within about 1.5 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Established in 1855.
Notable people born here
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Eureka CUD 140, Woodford Cty Special Ed Assoc. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Davenport Elem SchoolEureka | Pre-K–4 | 430 | Public | 0.3 mi |
| Eureka Middle SchoolEureka | 5–8 | 436 | Public | 1.0 mi |
| Eureka High SchoolEureka | 9–12 | 513 | Public | 0.3 mi |
| WCSEA Eureka Intensive ECEEureka | — | — | Special Education | 0.3 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.