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History · Allens Grove Township

48% of Allens Grove Township’s homes were built before 1940

Below: maps from 1942 on.

0on the National Register
48%homes built before 1940
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What stands out about Allens Grove Township’s past

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

A history waiting to be writtenNo old photos of Allens Grove Township are in the public archives yet. The rest are in attics and albums.Old housesHalf of Allens Grove Township’s homes were built before 1944.
★ What stands out · Help out

Start Allens Grove Township’s collection

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

Decades since 1900 with photos
00s10s20s30s40s50s60s70s80s90s
0 of 10 decades. The empty ones are waiting for someone’s album.
Share a family photoSign in to add one+10
The story so far

Allens Grove Township, in brief

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

Allens Grove Township is located in Mason County, Illinois. As of the 2020 census, its population was 470 and it contained 238 housing units.

Between the 2010 and 2020 censuses its population fell from 586 to 470 (-20%).

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

Timeline

Allens Grove Township, 1868 to 1942

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

  1. 19th century
  2. 1868Post officeThe Natrona post office opens
  3. 20th century
  4. 1936Post officeThe Natrona post office closes
  5. 1942On the mapFirst mapped by the U.S. Geological Survey
By decade

Allens Grove Township, decade by decade

Today1 recent
Allens Grove Township building 2026-08-272026Allens Grove Township building 2026-08-27
On the map

Allens Grove Township on the map, 1942 to 1980

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

Allens Grove Township on the 1942 USGS mapAllens Grove Township on the 1980 USGS map1942Delavan 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 Allens Grove Township.

Famous people

Famous people close to Allens Grove Township

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

See all →
Gordon BuehrigAmerican designer · b. 1904
Joe SullivanAmerican baseball player · b. 1910
J
John A. HartsAmerican football coach · b. 1873
Places that used to be

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

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

Hamlets and corners on the map
AllenNatrona
Gone or out of use
Allen Grove SchoolschoolAsh Grove SchoolschoolCherry Grove SchoolschoolLake Grove SchoolschoolReed Schoolschool
1cemetery inside Allens Grove Township
Allens Grove

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.

Malone TownshipIts storynot graded: under 1,000 residents or part of its townPrairie Creek TownshipIts storynot graded: under 1,000 residents or part of its townMason City TownshipIts storynot graded: under 1,000 residents or part of its town

Questions about Allens Grove Township’s history

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 Wikimedia Commons (1), U.S. Geological Survey historical maps, 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.