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History · Greenbush Township

Greenbush Township’s post office opened in 1838, and 15% of its homes were built before 1940

1838first post office
0on the National Register
15%homes built before 1940
Quick answers

How Greenbush Township began

When was Greenbush Township founded?

1838

The Greenbush Township post office opened in 1838, the earliest record of the town by name. Another post office, Greenbush (1838), opened inside today’s town and later closed.

2020 census: 517188 years
Founding year: the first Greenbush Township post office (Blevins & Helbock, CC0).

What stands out about Greenbush Township’s past

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

★ What stands out · Help out

Start Greenbush Township’s collection

The first neighbors to add old photos shape how Greenbush Township’s history is told.

Decades since 1900 with photos
00s10s20s30s40s50s60s70s80s90s
0 of 10 decades. The empty ones are waiting for someone’s album.
The story so far

Greenbush Township, in brief

Wikipedia doesn’t have a history of Greenbush Township yet. The photos, dates and memories neighbors add here are how it gets written.

Greenbush is an unincorporated community in Warren County, Illinois, United States. Greenbush is 7 miles (11 km) east-southeast of Roseville.

Its first post office opened in 1838. Between the 2010 and 2020 censuses its population fell from 533 to 517 (-3%).

Intro from Wikipedia. Population: U.S. Census Bureau.

By decade

No old photos in the archives yet

Weddings on Main Street, storms, parades, school pictures, the old store. If it’s in your family album, it belongs here.

Be the first to add onePhotograph a print flat, in daylight, no flash.
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Famous people

Famous people close to Greenbush Township

Nobody well known was born in Greenbush Township itself, so here are the best known from just nearby.

See all →
Places that used to be

Lost post offices, old corners, places now gone and burying grounds

Another post office, Greenbush, opened and closed inside today’s town.

Hamlets and corners on the map
Greenbush
Gone or out of use
Greenleaf SchoolschoolHalls SchoolschoolLong RLA AirportairportOlive SchoolschoolSailer SchoolschoolSaunders HospitalhospitalSimmons SchoolschoolSloey SchoolschoolStar SchoolschoolTaft Schoolschool
6cemeteries and burying grounds inside Greenbush Township
BondGreenbushHolemanHolemanMcMahillOld Prairie City

US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).

Stories next door

History across the town line

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

Questions about Greenbush Township’s history

What year was Greenbush Township founded?

The Greenbush Township post office opened in 1838, the earliest record of the town by name (U.S. post office records).

Memory lane

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

Town Square →
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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). How TownRatings grades history →

From 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.