Each edition grades its towns against each other only.
More historic than 34% of U.S. towns. What drives it
Below: maps from 1914 on and the census since 1880.
The Sandoval Township post office opened in 1854, the earliest record of the town by name.
More historic than 34% of U.S. towns, on its age, its old homes and the National Register.
On its age, its old homes and the National Register, Sandoval Township is more historic than 34% 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 Sandoval 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 Sandoval Township’s history is told.
Peaked at 1,796 in 1940; 1,157 people lived here in 2020.
15 censuses, 1880–2020.
U.S. Census Bureau decennial counts, from the census table on Sandoval Township’s Wikipedia page.
Every edition of the U.S. Geological Survey’s map of Sandoval 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 Sandoval Township.
From Wikipedia’s history of Sandoval Township.
In the early days, this area was the crossroads of well traveled Native American trails. A man with the name of Sandoval was the first to establish a trading post. In 1859 the town of Sandoval was incorporated.
Text from Wikipedia, licensed CC BY-SA 4.0.
Places and cemeteries from the USGS Geographic Names Information System (2021).
Each neighbor’s History grade, on the same three inputs.
The Sandoval Township post office opened in 1854, the earliest record of the town by name (U.S. post office records).
Sandoval Township is more historic than 34% 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.
14% of Sandoval Township’s homes were built before 1940 (Census estimate, ±4.7 points), against a typical 11% for an Illinois town; the median home was built in 1977.
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 (1), Wikipedia, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia) 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.
2025