Each edition grades its towns against each other only.
More historic than 19% of U.S. towns · #640 of 768 in Illinois. What drives it
Most of Diamond was built recently: 3% of its homes predate 1940 and the median home dates from 1991. Below: maps from 1953 on and the census since 1880.
The Diamond post office opened in 1872, the earliest record of the town by name.
More historic than 19% of U.S. towns, on its age, its old homes and the National Register.
On its age, its old homes and the National Register, Diamond is more historic than 19% of U.S. towns, #640 of 768 in Illinois. Its age holds the grade up; its share of homes from before 1940 pulls 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 Diamond’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: 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 →
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 Diamond’s history is told.
Lost two-thirds of its people between 1900 and 1940, then grew more than tenfold.
14 censuses, 1880–2020.
U.S. Census Bureau decennial counts, from the census table on Diamond’s Wikipedia page.
From Wikipedia’s history of Diamond.
A post office called Diamond was established in 1872, and remained in operation until 1909. Black Diamond had its start as a coal town. The village was named for its location in the center of the "Black Diamond" coal district.
On February 16, 1883, the Diamond Mine flooded, killing 72 miners. A monument was erected in Diamond memorializing the event.
Text from Wikipedia, licensed CC BY-SA 4.0.
Woven from the archive, old maps, post office records, the National Register and the people born here.
On the mapFirst mapped by the U.S. Geological SurveyEvery edition of the U.S. Geological Survey’s map of Diamond. Tap a year, or press play to watch the town change.
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Diamond.
Nobody well known was born in Diamond itself, so here are the best known from just nearby.
Diamond had its own post office from 1872 to 1909.
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.
The Diamond post office opened in 1872, the earliest record of the town by name (U.S. post office records).
Diamond is more historic than 19% of U.S. towns, #640 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.
3% of Diamond’s homes were built before 1940 (Census estimate, ±3.1 points), against a typical 11% for an Illinois town; the median home was built in 1991.
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 Wikimedia Commons (2), Wikipedia, 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.
2012
2012
