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History · Dahlgren

Dahlgren’s post office opened in 1871, and 45% of its homes were built before 1940

Below: maps from 1942 on and the census since 1880.

1871first post office
0on the National Register
45%homes built before 1940
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Quick answers

How Dahlgren began

When was Dahlgren founded?

1871

The Dahlgren post office opened in 1871, the earliest record of the town by name. Wikidata gives 1872.

First census: 205 in 18802020 census: 504155 years
Founding year: the first Dahlgren post office (Blevins & Helbock, CC0). Wikidata: 1872.The full story ↓

What stands out about Dahlgren’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 Dahlgren are in the public archives yet. The rest are in attics and albums.Boom and bustPeaked at 693 in 1920; 504 people lived here in 2020.Old housesHalf of Dahlgren’s homes were built before 1960.
★ What stands out · Help out

Start Dahlgren’s collection

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

Decades since 1900 with photos
00s10s20s30s40s50s60s70s80s90s
0 of 10 decades. The empty ones are waiting for someone’s album.
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People over time

Dahlgren, census by census

010020030040050060070018801900192019401960198020002020Peak: 693

Peaked at 693 in 1920; 504 people lived here in 2020.

15 censuses, 1880–2020.

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

The story

How Dahlgren came to be

From Wikipedia’s history of Dahlgren.

Read it all →

The area around present-day Dahlgren was known in the 1860s as the Shelton Precinct in Hamilton County before townships were formally established. In 1869 surveyors for the St. Louis & South-Eastern Rail Road (predecessor to the Louisville and Nashville Railroad) referred to the future town site as "Little Prairie." Construction of the railroad commenced in 1870 and was completed through the area in late 1871. At that time railroad officials applied to establish a post office in the nascent town which was to be home to the local railroad section boss. After the name "Cottonwood" was rejected by the U. S. postmaster (having already been used in Illinois) the name "Dahlgren" was assigned and the post office commenced operation on December 11, 1871. The village was named for John A. Dahlgren (1809–1870), a U.S. naval officer prominent during the American Civil War. On March 29, 1872, the o…

Text from Wikipedia, licensed CC BY-SA 4.0.

Timeline

Dahlgren, 1871 to 1942

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

  1. 19th century
  2. 1871Post officeThe Dahlgren post office opens
  3. 20th century
  4. 1920CensusPopulation peaks at 693
  5. 1942On the mapFirst mapped by the U.S. Geological Survey
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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On the map

Dahlgren on the map, 1942 to 1974

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

Dahlgren on the 1942 USGS mapDahlgren on the 1974 USGS map1942McLeansboro 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 Dahlgren.

Famous people

Famous people close to Dahlgren

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

See all →
Jerry SloanAmerican basketball player and coach · b. 1942
John Henry StelleAmerican politician · b. 1891
Henry C. WarmothAmerican politician · b. 1842
Robert P. HillAmerican politician · b. 1874
James R. CampbellAmerican politician 1853-1924 · b. 1853
P
Phil OdleAmerican football player · b. 1942

Questions about Dahlgren’s history

What year was Dahlgren founded?

The Dahlgren post office opened in 1871, the earliest record of the town by name (U.S. post office records). Wikidata gives 1872.

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 Wikipedia, 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.