Each edition grades its towns against each other only.
Among the newest of U.S. towns. What drives it
Most of Rio was built recently: 0.0% of its homes predate 1940 and the median home dates from 2008. Below: maps from 1935 on.
Among the newest of U.S. towns, on its age, its old homes and the National Register.
On its age, its old homes and the National Register, Rio is among the newest of U.S. towns. Its National Register listings hold the grade up; its share of homes from before 1940 pulls it down.
Virginia towns list more on the Register than most of the country (a typical Virginia town has 3.6 per 10,000 residents, the U.S. 2.4), so Rio’s 0.0 sits below most of its state (17% of Virginia 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 Rio’s history is told.
Wikipedia doesn’t have a history of Rio yet. The photos, dates and memories neighbors add here are how it gets written.
Rio ( RY-oh) is an unincorporated community and census-designated place in Albemarle County, Virginia, United States. It is directly northeast of Charlottesville. As of the 2020 census, Rio had a population of 2,076.
Intro from Wikipedia. Population: U.S. Census Bureau.
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 Rio. 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 Rio.
Nobody well known was born in Rio itself, so here are the best known from just nearby.
Old hamlets and crossroads still carry their names on the map.
Places and cemeteries from the USGS Geographic Names Information System (2021).
Rio is among the newest 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.
0.0% of Rio’s homes were built before 1940 (Census estimate, ±1.7 points), against a typical 1.9% for a Virginia town; the median home was built in 2008.
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 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.
