More historic than 16% of U.S. towns · #672 of 768 in Illinois. What drives it
Most of Oak Lawn was built recently: 4% of its homes predate 1940 and the median home dates from 1966. Below: 3 old photos and papers, maps from 1890 on, and the census since 1910.
Founding year: Wikipedia. First post office: 1882.The full story ↓
History grade
What drives Oak Lawn’s History grade
On its age, its old homes and the National Register, Oak Lawn is more historic than 16% of U.S. towns, #672 of 768 in Illinois. Its share of homes from before 1940 holds the grade up; its National Register listings pull it down.
C−
HistoryA character grade: shown, never part of Oak Lawn’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 Oak Lawn’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.
NoteThe founding year comes from Wikipedia alone; no second source gives 1835.
How sure. Graded on two of the three inputs, so a change in either one moves the letter more than it would with three. The pre-1940 share (±0.8 points) is firm at this size.
Founding year: Wikipedia (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 Oak Lawn’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
In August 1835, James B. Campbell purchased the land stretching between Cicero Avenue and Central Avenue from 95th Street to 103rd Street. It is unclear what Campbell's intentions with the area were, but by 1840, he had lost a court battle with the Illinois State Bank and his land was sold in a public auction. John Simpson, a prominent figure in early Oak Lawn history, bought the northern half of the property in 1842. By 1859, the recently incorporated government of Worth Township paid for the construction of Black Oak Grove Road, an early name for 95th Street. Black Oak Grove is also the earliest known name of the area that would become Oak Lawn. It was later shortened to Black Oak or Black Oaks. Before this however, the area now known as Oak Lawn was, briefly during the early 1800s, called Agnes. It was also on some occasion referred to as Oak Park.
Nothing in the archives for these yearsWeddings on Main Street, storms, parades, school pictures, the old store. If it’s in your family album, it belongs here.
In 1835, according to Wikipedia’s history of the town. Oak Lawn’s post office opened in 1882, and the census of 1910 counted 287 people here.
How does Oak Lawn rank for history?
Oak Lawn is more historic than 16% of U.S. towns, #672 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.
How old are the homes in Oak Lawn?
4% of Oak Lawn’s homes were built before 1940 (Census estimate), against a typical 11% for an Illinois town; the median home was built in 1966.
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 (12), 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) 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.