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History · Edgar

Edgar’s post office opened in 1909, and 43% of its homes were built before 1940

Below: maps from 1956 on.

1909first post office
0on the National Register
43%homes built before 1940
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Quick answers

How Edgar began

When was Edgar founded?

1909

The Edgar post office opened in 1909, the earliest record of the town by name.

2020 census: 110117 years
Founding year: the first Edgar post office (Blevins & Helbock, CC0).

What stands out about Edgar’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 Edgar are in the public archives yet. The rest are in attics and albums.
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Start Edgar’s collection

The first neighbors to add old photos shape how Edgar’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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The story so far

Edgar, in brief

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

Edgar is a census-designated place and unincorporated community in Carbon County, Montana, United States. As of the 2020 census, Edgar had a population of 110. Edgar has a post office with a ZIP code 59026. The post office was established May 28, 1909 with John J. Thornton as its first postmaster. Thornton named the town after his brother. Edgar lies east of the intersection of U.S. Route 310 and Elwell Street. Edgar is south of Rockvale and northeast of Fromberg. Edgar is a small, agricultural community with a number of silos and elevators.

Its first post office opened in 1909. Between the 2010 and 2020 censuses its population fell from 114 to 110 (-4%).

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.

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On the map

Edgar on the map, 1956 to 1989

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

Edgar on the 1956 USGS mapEdgar on the 1989 USGS map1956Edgar sheet · 1:24,000

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

Questions about Edgar’s history

What year was Edgar founded?

The Edgar post office opened in 1909, the earliest record of the town by name (U.S. post office records).

Memory lane

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

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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 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.