Each edition grades its towns against each other only.
More historic than 64% of U.S. towns · #299 of 768 in Illinois. What drives it
Below: 4 old photos and papers, maps from 1912 on, and the census since 2000.
More historic than 64% of U.S. towns, on its age, its old homes and the National Register.
On its age, its old homes and the National Register, Cahokia Township is more historic than 64% of U.S. towns, #299 of 768 in Illinois. Its share of homes from before 1940 holds the grade up; its National Register listings pull it down.
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 Cahokia Township’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.
Founding year: our sources. 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 →
Read from the archive, the National Register and the record. The page puts what stands out first.
The first neighbors to add old photos shape how Cahokia Township’s history is told.
Wikipedia doesn’t have a history of Cahokia Township yet. The photos, dates and memories neighbors add here are how it gets written.
Cahokia Township (T8N R6W) is located in Macoupin County, Illinois, United States. As of the 2010 census, its population was 3,378 and it contained 1,594 housing units.
Between the 2010 and 2020 censuses its population fell from 3,378 to 3,151 (-7%).
Intro from Wikipedia. Population: U.S. Census Bureau.
Woven from the archive, old maps, post office records, the National Register and the people born here.
One decade in the archive so far: the 1900s. Scroll each row; tap a photo for its story.
The U.S. Geological Survey’s map of Cahokia Township.
1912Gillespie sheet · 1:62,500U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Cahokia Township.
No then-and-now pairs yet. Take a photo from the same spot as an old one and they appear here side by side.
Find the spot, match the angle, and add your photo. It becomes the first then-and-now pair on Cahokia Township’s page.
Retake this view · +15Between 3,151 and 3,389 people in every census since 2000.
3 censuses, 2000–2020.
U.S. Census Bureau decennial counts, from the census table on Cahokia Township’s Wikipedia page.
Another post office, Hornsby, opened and closed inside today’s town.
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
Each neighbor’s History grade, on the same three inputs.
Cahokia Township is more historic than 64% of U.S. towns, #299 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.
35% of Cahokia Township’s homes were built before 1940 (Census estimate, ±6.4 points), against a typical 11% for an Illinois town; the median home was built in 1950.
What the archives can’t tell you, neighbors can.
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 the Library of Congress (4), 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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