Each edition grades its towns against each other only.
More historic than 26% of U.S. towns · #311 of 362 in Wisconsin. What drives it
Most of Union Grove was built recently: 8% of its homes predate 1940 and the median home dates from 1982. Below: maps from 1893 on and the census since 1880.
The Union Grove post office opened in 1850, the earliest record of the town by name.
More historic than 26% of U.S. towns, on its age, its old homes and the National Register.
On its age, its old homes and the National Register, Union Grove is more historic than 26% of U.S. towns, #311 of 362 in Wisconsin. Its share of homes from before 1940 holds the grade up; its National Register listings pull it down.
Wisconsin towns list more on the Register than most of the country (a typical Wisconsin town has 3.0 per 10,000 residents, the U.S. 2.4), so Union Grove’s 0.0 sits below most of its state (28% of Wisconsin 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 Union Grove’s history is told.
Every edition of the U.S. Geological Survey’s map of Union Grove. 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 Union Grove.
Fire insurance maps drew every building, what it was made of and what it was used for, so insurers could price the risk of fire. Pick a year, then a sheet.
1894Sheet 1 of 1Sanborn Map Company, via the Library of Congress. Editions published in 1930 or earlier, which are in the public domain.
Wikipedia doesn’t have a history of Union Grove yet. The photos, dates and memories neighbors add here are how it gets written.
Union Grove is a village in Racine County, Wisconsin, United States. The population was 4,806 at the 2020 census.
Its first post office opened in 1850. Between the 2010 and 2020 censuses its population fell from 4,915 to 4,806 (-2%).
Intro from Wikipedia. Population: U.S. Census Bureau.
Between 412 and 4,915 people in every census since 1880.
15 censuses, 1880–2020.
U.S. Census Bureau decennial counts, from the census table on Union Grove’s Wikipedia page.
Union Grove’s post office has been open since 1850.
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 Union Grove post office opened in 1850, the earliest record of the town by name (U.S. post office records).
Union Grove is more historic than 26% of U.S. towns, #311 of 362 in Wisconsin. 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.
8% of Union Grove’s homes were built before 1940 (Census estimate, ±4.6 points), against a typical 12% for a Wisconsin town; the median home was built in 1982.
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 (6), U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia), the US Post Offices dataset (Blevins & Helbock), the USGS Geographic Names Information System and Sanborn fire insurance maps (Library of Congress). Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.
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