Each edition grades its towns against each other only.
More historic than 46% of U.S. towns. What drives it
Below: maps from 1932 on and the census since 1880.
The Rockbridge Township post office opened in 1850, the earliest record of the town by name. Another post office, Fayette (1837), opened inside today’s town and later closed.
More historic than 46% of U.S. towns, on its age, its old homes and the National Register.
On its age, its old homes and the National Register, Rockbridge Township is more historic than 46% of U.S. towns. 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 Rockbridge 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: 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 Rockbridge Township’s history is told.
Peaked at 275 in 1910; 175 people lived here in 2020.
15 censuses, 1880–2020.
U.S. Census Bureau decennial counts, from the census table on Rockbridge Township’s Wikipedia page.
Wikipedia doesn’t have a history of Rockbridge Township yet. The photos, dates and memories neighbors add here are how it gets written.
Rockbridge is a village in southeastern Greene County, Illinois, United States. The population was 175 at the 2020 census.
Its first post office opened in 1850. Between the 2010 and 2020 censuses its population fell from 1,633 to 1,562 (-4%).
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.
Weddings on Main Street, storms, parades, school pictures, the old store. If it’s in your family album, it belongs here.
Every edition of the U.S. Geological Survey’s map of Rockbridge Township. 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 Rockbridge Township.
Nobody well known was born in Rockbridge Township itself, so here are the best known from just nearby.
Another post office, Fayette, 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.
The Rockbridge Township post office opened in 1850, the earliest record of the town by name (U.S. post office records).
Rockbridge Township is more historic than 46% of U.S. towns. 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.
26% of Rockbridge Township’s homes were built before 1940 (Census estimate, ±6.6 points), against a typical 11% for an Illinois town; the median home was built in 1966.
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 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.
