Most of Prairie Grove was built recently: 3% of its homes predate 1940 and the median home dates from 2001. Below: maps from 1963 on and the census since 1980.
On its age, its old homes and the National Register, Prairie Grove is more historic than 8% of U.S. towns. Its National Register listings hold the grade up; its age pulls it down.
D
HistoryA character grade: shown, never part of Prairie Grove’s overall grade.
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 Prairie Grove’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.
How sure. Graded on any two of the three inputs instead, the letter would range from D− to C−. The pre-1940 share (±2.2 points) is firm at this size.
Founding year: the first census (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 →
What stands out about Prairie Grove’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Though Prairie Grove had been inhabited by settlers since the early 19th century in an area known as Barreville, the Village of Prairie Grove was incorporated in 1973. Since 2004, Prairie Grove has been a home rule community.
Every edition of the U.S. Geological Survey’s map of Prairie Grove. Tap a year, or press play to watch the town change.
1963McHenry sheet · 1:24,000
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Prairie Grove.
People over time
Prairie Grove, census by census
Grew from 680 people in 1980 to 1,963 in 2020.
5 censuses, 1980–2020.
U.S. Census Bureau decennial counts, from the census table on Prairie Grove’s Wikipedia page.
Famous people
Famous people close to Prairie Grove
Nobody well known was born in Prairie Grove itself, so here are the best known from just nearby.
The Prairie Grove post office opened in 1980, the earliest record of the town by name (U.S. post office records).
How does Prairie Grove rank for history?
Prairie Grove is more historic than 8% 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.
How old are the homes in Prairie Grove?
3% of Prairie Grove’s homes were built before 1940 (Census estimate, ±2.2 points), against a typical 11% for an Illinois town; the median home was built in 2001.
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 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.