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CHistory
History · Oak Forest

Oak Forest dates to 1800

More historic than 34% of U.S. towns · #520 of 768 in Illinois. What drives it

Most of Oak Forest was built recently: 2% of its homes predate 1940 and the median home dates from 1975. Below: 7 old photos and papers, maps from 1892 on, and the census since 1950.

1800founded
0on the National Register
2%homes built before 1940
7old photos & papers
2famous people
From Oak Forest’s archive · credits on each photo
Quick answers

How Oak Forest began

When was Oak Forest founded?

1800

Oak Forest dates its founding to 1800 (Wikidata). The census first counted it in 1950.

First census: 1,856 in 19502020 census: 27,478226 years

How historic is Oak Forest?

C

More historic than 34% of U.S. towns, on its age, its old homes and the National Register.

What drives the grade ↓
Founding year: Wikidata. First post office: 1912.The full story ↓
History grade

What drives Oak Forest’s History grade

On its age, its old homes and the National Register, Oak Forest is more historic than 34% of U.S. towns, #520 of 768 in Illinois. Its age holds the grade up; its share of homes from before 1940 pulls it down.

C
HistoryA character grade: shown, never part of Oak Forest’s overall grade.
All U.S. towns we grade (21,289)Ahead of 34%
NewerOlder
Illinois towns of 2,500+ (768)Ahead of 32%

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 Forest’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 Wikidata alone; no second source gives 1800.
How sure. Graded on any two of the three inputs instead, the letter would range from D to B−. The pre-1940 share (±0.7 points) is firm at this size.

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 Oak Forest’s past

Read from the archive, the National Register and the record. The page puts what stands out first.

★ What stands out · On the map

Oak Forest on the map, 1892 to 1993

Every edition of the U.S. Geological Survey’s map of Oak Forest. Tap a year, or press play to watch the town change.

Oak Forest on the 1892 USGS mapOak Forest on the 1900 USGS mapOak Forest on the 1929 USGS mapOak Forest on the 1953 USGS mapOak Forest on the 1963 USGS mapOak Forest on the 1973 USGS mapOak Forest on the 1993 USGS map1892Calumet sheet · 1:62,500

U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Oak Forest.

Timeline

Oak Forest, 1800 to 1969

Woven from the archive, old maps, post office records, the National Register and the people born here.

  1. 19th century
  2. 1800
    FoundingOak Forest is established
  3. 1880In the archive1940 Census Enumeration District Maps - Illinois - Cook County - Oak Forest - ED 16-105, …
  4. 1892On the mapFirst mapped by the U.S. Geological Survey
  5. 20th century
  6. 1910In the archiveDunning inmates arriving at Oak Forest Infirmary n008789
  7. 1912Post officeThe Oak Forest post office opens
  8. 1968Born hereTom Vanderbilt is born here
  9. 1969Born hereLisa Joann Thompson is born here
The story

How Oak Forest came to be

From Wikipedia’s history of Oak Forest.

Read it all →

Human habitation in Oak Forest began during the early Holocene. This is made evident by the remains of hunting camps on what would become the grounds of the city's hospital. Several millennia later, the final known indigenous settlement in Oak Forest, a Potawatomi longhouse village, was established nearby. However, it was abandoned by the 1620s.

Text from Wikipedia, licensed CC BY-SA 4.0.

By decade

Oak Forest, decade by decade

2 decades in the archive, from the 1880s to the 1910s. Scroll each row; tap a photo for its story.

Then & now

Stand where they stood

No then-and-now pairs yet. Take a photo from the same spot as an old one and they appear here side by side.

1940 Census Enumeration District Maps - Illinois - Cook County - Oak Forest - ED 16-105, ED 16-106
Retake this view1940 Census Enumeration District Maps - Illinois - Cook County - Oak Forest - ED 16-105, ED 16-106, 1880

Find the spot, match the angle, and add your photo. It becomes the first then-and-now pair on Oak Forest’s page.

Retake this view · +15
People over time

Oak Forest, census by census

05,00010,00015,00020,00025,00030,0001960198020002020Peak: 28,051

Between 1,856 and 28,051 people in every census since 1950.

8 censuses, 1950–2020.

U.S. Census Bureau decennial counts, from the census table on Oak Forest’s Wikipedia page.

Famous people

2 famous people were born in Oak Forest

Writers, athletes, leaders and more, ranked by how widely they’re known.

See all →
Help out

Finish Oak Forest’s story

Most archives stop around 1920. The photos from after that are in family albums, not libraries.

Decades since 1900 with photos
00s10s20s30s40s50s60s70s80s90s
1 of 10 decades. The empty ones are waiting for someone’s album.
Stories next door

History across the town line

Each neighbor’s History grade, on the same three inputs.

Questions about Oak Forest’s history

What year was Oak Forest founded?

In 1800, according to Wikidata. Oak Forest’s post office opened in 1912, and the census of 1950 counted 1,856 people here.

How does Oak Forest rank for history?

Oak Forest is more historic than 34% of U.S. towns, #520 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 Forest?

2% of Oak Forest’s homes were built before 1940 (Census estimate), against a typical 11% for an Illinois town; the median home was built in 1975.

Memory lane

What the archives can’t tell you, neighbors can.

Town Square →
Start a conversation
Sources

Where this page comes from

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 (11), 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.