More historic than 15% of U.S. towns · #686 of 768 in Illinois. What drives it
Most of Chicago Ridge was built recently: 1% of its homes predate 1940 and the median home dates from 1972. Below: 6 old photos and papers, maps from 1890 on, and the census since 1920.
Founding year: the first Chicago Ridge post office (Blevins & Helbock, CC0). Wikidata: 1914.The full story ↓
History grade
What drives Chicago Ridge’s History grade
On its age, its old homes and the National Register, Chicago Ridge is more historic than 15% of U.S. towns, #686 of 768 in Illinois. Its age holds the grade up; its share of homes from before 1940 pulls it down.
C−
HistoryA character grade: shown, never part of Chicago Ridge’s overall grade.
Few Illinois towns list much on the Register (a typical Illinois town has 0.5 per 10,000 residents, the U.S. 2.4), so Chicago Ridge’s 0.0 sits below most of its state (28% of Illinois towns have fewer) while its 0 listings outnumber those of 23% of U.S. towns.
How sure. Graded on any two of the three inputs instead, the letter would range from D to C−. The pre-1940 share (±0.9 points) is firm at this size. The founding year is the first post office, not a stated founding date; Wikidata gives 1914.
Founding year: the first post office (other dates in Quick answers). Homes: Census ACS 2020–24. National Register: National Park Service, May 2026 list; each listing counted once (boundary changes and added documentation belong to their listing), and a historic district counts its contributing buildings. How TownRatings grades history →
What stands out about Chicago Ridge’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Every edition of the U.S. Geological Survey’s map of Chicago Ridge. Tap a year, or press play to watch the town change.
1890Des Plaines sheet · 1:62,500
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Chicago Ridge.
Chicago Ridge takes its name from ridges left behind when trainloads of dirt were brought out by the Wabash Railroad during construction of the Columbian Exposition of 1893.
Incorporated on October 17, 1914, the village has an area of approximately 2.2 square miles (5.7 km2) and is located in the southwestern portion of Cook County, Illinois, about 20 miles (32 km) southwest of downtown Chicago.
Nothing in the archives for these yearsWeddings on Main Street, storms, parades, school pictures, the old store. If it’s in your family album, it belongs here.
The Chicago Ridge post office opened in 1899, the earliest record of the town by name (U.S. post office records). Wikidata gives 1914.
How does Chicago Ridge rank for history?
Chicago Ridge is more historic than 15% of U.S. towns, #686 of 768 in Illinois. The History grade combines the town’s founding era, the share of homes built before 1940 and its National Register listings. It’s a character grade, so it isn’t part of the overall grade. How it works.
How old are the homes in Chicago Ridge?
1% of Chicago Ridge’s homes were built before 1940 (Census estimate), against a typical 11% for an Illinois town; the median home was built in 1972.
Founding dates: Wikidata, Wikipedia, the U.S. post office records of Blevins & Helbock (CC0) and the Census. Homes by year built: Census ACS 2020–24. National Register of Historic Places: National Park Service (list of May 22, 2026). Old photos, postcards and papers: Wikimedia Commons, the Library of Congress and other public archives, credited on each item’s page. Maps: U.S. Geological Survey historical topographic maps (via Esri) and Sanborn fire-insurance maps (Library of Congress). History text and census tables: Wikipedia (CC BY-SA 4.0). Places that used to be: USGS Geographic Names Information System (2021).
From Wikimedia Commons (6), Wikipedia, Wikidata and Wikipedia for famous people, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia), the US Post Offices dataset (Blevins & Helbock) and the USGS Geographic Names Information System. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.
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