Marengo is a city in McHenry County, Illinois, United States on the Kishwaukee River. It lies approximately 60 miles west northwest of Chicago and approximately 30 miles east of Rockford. Per the 2020 census, the population was 7,568.

Official town website ↗

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

How Marengo ranks

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#42Most new homes in IL #230Lowest obesity in IL #230Highest graduation rate in IL All IL rankings →

Town numbers

ZIP code60152

Area code815

Living in Marengo

Housing in Marengo

$339K Median sale price · Redfin, May 2026

The median sale price was $339,000 in May 2026.

A seller's market

Buyer’sBalancedSeller’s

Days on market42

Sale-to-list99.8%

Sold in May10

Zillow Home Value Index · Redfin Data CenterHousing market →

Safety in Marengo

B⁺

Safety Grade B+

Marengo reports less crime per resident than 65% of the U.S. towns and cities we grade. Illinois has less reported crime than most states, so among its own towns Marengo sits closer to the middle.

Violent crime per 1,000

Marengo 1.9

Illinois 2.6

U.S. 3.3

Property crime per 1,000

Marengo 6.6

Illinois 15.6

U.S. 15.5

FBI crime data, 2025 · crimes reported to policeCrime & safety →

Work & commute in Marengo

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Most working residents leave Marengo for work: only 9% work in town. The top destinations are Chicago (8%), Elgin (5%) and Crystal Lake (3%). Half commute less than 25 miles.

Chicago

Elgin

Crystal Lake

Woodstock

9%Work in townlive and work in Marengo 25 miWhere do people commute?the commute map 2,099Jobs based herea commuter town

Census LEHD 2023 · ACSWork & commute in Marengo →

Health in Marengo

B⁺

Health Grade B+

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

Compared with Illinois

≈Just like Illinois

No difference on any of 32 measures is outside the margin of error.

Conditions all close Habits all close Care all close Mind all close Everyday needs all close

BetterToo close to callWorse

What stands out

Nothing stands out: Marengo tracks Illinois closely.

Care nearby

Mercy Harvard HospitalHarvard · 12.4 mi · ER · rural critical access

Aunt Martha's Woodstock Community Health CenterWoodstock · 10.2 mi · sliding-scale fees

Primary careNo shortage

DentalNo shortage

Mental healthShortage · county-wide

CDC PLACES 2025 · modeled estimates for adults · CDC's estimate for Marengo · CMS · HRSAHealth in Marengo →

Natural hazards in Marengo

Low

Expected storm and flood damage is higher than in 25% of U.S. communities.

🌊 Inland flooding🌪️ Tornadoes🥶 Cold waves

12Does Marengo flood?paid flood claims since 1978 4Disasters that paid out herefederal disasters sent FEMA money to Marengo

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

Climate in Marengo

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Marengo has cold, snowy winters and pleasant summers. A typical July afternoon reaches 83°, a January night drops to 14°, and about 31 inches of snow falls in a normal winter.

32° / 17°Winter

58° / 37°Spring

81° / 60°Summer

61° / 41°Fall