Olio Township is located in Woodford County, Illinois. As of the 2010 census, its population was 4,931 and it contained 1,879 housing units. The largest named community in Olio Township is the city of Eureka, the Woodford County seat.

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How Olio ranks

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#18Highest graduation rate in IL #48Cheapest rent in IL #31Best schools in IL All IL rankings →

Town numbers

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Living in Olio

Health in Olio

B⁺

Health Grade B+

Healthier than 67% of U.S. towns on seven CDC estimates, and 94% of towns with similar incomes.

Compared with Illinois

5better than IL·2worse

of 32 measures CDC estimates. The other 25 are too close to call.

Conditions 2▼ 10 close Habits all close Care 1▲ 6 close Mind all close Everyday needs 4▲ 0 close

BetterToo close to callWorse

What stands out

6.3%Fewer uninsured adultsIL 9.9% · better 9%Fewer adults facing housing insecurityIL 13.2% · better 9.7%More adults who have had cancerIL 7.6% · worse

Care nearby

Carle Eureka HospitalEureka · 2.7 mi · ER · rural critical access

Heartland Community Health Clinic Dba: Heartland Health Services - MainEureka · 2.6 mi · sliding-scale fees

Primary careShortage · county-wide

DentalShortage · county-wide

Mental healthShortage · county-wide

CDC PLACES 2025 · modeled estimates for adults · ZIP codes 61530, 61771, 61729 · CMS · HRSAHealth in Olio →

Natural hazards in Olio

Moderate

Expected storm and flood damage is higher than in 50% of U.S. communities.

🌊 Inland flooding🥶 Cold waves🌪️ Tornadoes

1Does Olio flood?paid flood claims since 2015 1Disasters that paid out herefederal disaster sent FEMA money to Olio MapOlio vs. its neighborsnearby towns shaded by rating

FEMA National Risk Index December 2025 · OpenFEMANatural hazards in Olio →

Schools in Olio

All Olio schools →

School Grade A

The public schools Olio’s kids attend, from kindergarten through graduation, outperform 92% of Illinois’s districts on state tests and graduation. Among towns with similar incomes, they rank near the top.

#31Best public schoolsof 384 in IL

DistrictEureka CUD 140Schools4

Davenport Elem School A-Elementary · Grades PK–4 · 430 students Eureka Middle School AMiddle · Grades 5–8 · 436 students Eureka High School AHigh · Grades 9–12 · 513 students WCSEA Eureka Intensive ECEGrades M

School data from the U.S. Department of Education (NCES, EDFacts). The School Grade is our own summary of state test results and graduation rates, graded within IL. Ratings are from neighbors.