Hollis Township is located in Peoria County, Illinois. As of the 2010 census, its population was 1,881 and it contained 768 housing units. The village of Mapleton is the only incorporated town in the township.

Official town website ↗

From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)

Town numbers

ZIP codeSign in to add

Area codeSign in to add

Living in Hollis

Health in Hollis

B⁺

Health Grade B+

Healthier than 67% of U.S. towns on seven CDC estimates.

Compared with Illinois

5better than IL·4worse

of 32 measures CDC estimates. The other 23 are too close to call.

Conditions 4▼ 8 close Habits all close Care 1▲ 6 close Mind all close Everyday needs 4▲ 0 close

BetterToo close to callWorse

What stands out

6.5%Fewer uninsured adultsIL 9.9% · better 9.1%Fewer adults facing housing insecurityIL 13.2% · better 9.8%More adults who have had cancerIL 7.6% · worse

Care nearby

Carle Health Pekin HospitalPekin · 4.1 mi · ER

Heartland Community Health Clinic Dba: Heartland Health Services - OltPekin · 5.8 mi · sliding-scale fees

Primary careShortage · county-wide

DentalShortage · county-wide

Mental healthShortage · county-wide

CDC PLACES 2025 · modeled estimates for adults · ZIP codes 61607, 61547 · CMS · HRSAHealth in Hollis →

Natural hazards in Hollis

Moderate

Expected storm and flood damage is higher than in 47% of U.S. communities.

🌊 Inland flooding🥶 Cold waves🌪️ Tornadoes

0Does Hollis flood?no paid flood claims on record 1Disasters that paid out herefederal disaster sent FEMA money to Hollis MapHollis vs. its neighborsnearby towns shaded by rating

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

Climate in Hollis

Full climate →

Hollis has chilly winters and warm summers. A typical July afternoon reaches 86°, a January night drops to 17°, and about 26 inches of snow falls in a normal winter.

37° / 20°Winter

63° / 41°Spring

85° / 63°Summer

65° / 43°Fall

How much snow does Hollis get?About 26 inches a winter.Rain & snow →When is the first frost?Around Oct 23, with the last in spring around Apr 16.Frost dates →Is it warmer than it used to be?+1.3° vs. the 20th century.Then & now →

NOAA U.S. Climate Normals, 1991–2020Climate in Hollis →

Schools in Hollis

All Hollis schools →

C⁺

School Grade C+

The public schools Hollis’s kids attend, from kindergarten through graduation, trail 62% of Illinois’s districts on state tests and graduation. Among towns with similar incomes, they rank near the bottom.

DistrictHollis Cons SD 328Schools1

Hollis Consolidated Grade Sch A-Elementary · Grades K–8 · 147 students

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.