Peru dates to 1838, and 28% of its homes were built before 1940
More historic than 88% of U.S. towns · #100 of 768 in Illinois. What drives it
1 place in town is on the National Register, among them a historic district with 3 buildings. Below: 6 old photos and papers, maps from 1893 on, and the census since 1850.
Founding year: Wikidata; Wikipedia’s history section gives the same year. First post office: 1848.The full story ↓
History grade
What drives Peru’s History grade
On its age, its old homes and the National Register, Peru is more historic than 88% of U.S. towns, #100 of 768 in Illinois. All 3 inputs are above most U.S. towns; its share of homes from before 1940 ranks highest and its National Register listings lowest.
A
HistoryA character grade: shown, never part of Peru’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 Peru’s 3.1 sits above most of its state (71% of Illinois towns have fewer) while its 3 historic buildings outnumber those of 65% of U.S. towns.
How sure. Graded on any two of the three inputs instead, the letter would range from A− to A. The pre-1940 share is a Census survey estimate (±4.5 points). Two sources give 1838.
Founding year: Wikidata (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 Peru’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
The city's first settler was John Hays, who arrived in 1830. The city was organized as a borough in 1838, incorporated as a village February 25, 1845, and incorporated as a city on March 13, 1851. The original plat was between West Street, 4th Street, and East Street (now Pine Street).
Passages that mention Peru, cut from the printed page as they were published.
History of LaSalle County, Illinois1877 · page 547Read the page →
Read the text
Peru was firet surveyed and platted by the school commission: ers in 1834. The Ninawa addition was platted and recorded by T. D. Brewster in 1836, embracing moat of the business part of the town. Pera was incorporated acity in Mareh, 1861, T.D, Brows ter wus the first mayor Vote polled im 1876, 862, and the popula.
Text read by machine from the scan; it may contain errors.
Scans and text from the Internet Archive. Books published in 1930 or earlier, which are in the public domain.
By decade
Peru, decade by decade
One decade in the archive so far: the 1860s. Scroll each row; tap a photo for its story.
In 1838, according to Wikidata and Wikipedia’s history of the town. Peru’s post office opened in 1848, and the census of 1850 counted 1,279 people here.
How does Peru rank for history?
Peru is more historic than 88% of U.S. towns, #100 of 768 in Illinois. 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.
What is on the National Register in Peru?
One place: the Westclox Manufacturing Plant Historic District (listed 2007).
How old are the homes in Peru?
28% of Peru’s homes were built before 1940 (Census estimate, ±4.5 points), against a typical 11% for an Illinois town; the median home was built in 1958.
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 (4), the Library of Congress (2), the National Register of Historic Places (1), Wikipedia, Wikidata and Wikipedia for famous people, 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 old county and town histories (Internet Archive). Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.