Guest, Sign inJoin

Post to Fallon

We’ll email a one-tap link to publish your post. No password, and nothing is public until you click it.
Already a member? Sign in
–Not graded
History · Fallon

Fallon’s post office opened in 1884, and 62% of its homes were built before 1940

Its Register listing is the Yellowstone River Bridge. Below: maps from 1916 on and the census since 2000.

1884first post office
1on the National Register
62%homes built before 1940
Add an old photoShare a memory
Quick answers

How Fallon began

When was Fallon founded?

1884

The Fallon post office opened in 1884, the earliest record of the town by name.

First census: 138 in 20002020 census: 122142 years
Founding year: the first Fallon post office (Blevins & Helbock, CC0).

What stands out about Fallon’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 Fallon are in the public archives yet. The rest are in attics and albums.Old housesHalf of Fallon’s homes were built before 1938.Boom and bustPeaked at 164 in 2010; 122 people lived here in 2020.
★ What stands out · Help out

Start Fallon’s collection

The first neighbors to add old photos shape how Fallon’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

Fallon, in brief

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

Fallon is an unincorporated town in Prairie County, Montana, United States. As of the 2020 census, Fallon had a population of 122. Although the town name has been co-opted for use by the United States Census Bureau as a census-designated place, this figure may include persons living well outside the town's limits. The town and county are named after O’Fallon Creek, which is in turn named for Benjamin O'Fallon, an Indian agent for the upper Missouri region from 1823 to 1827.

Its first post office opened in 1884. Between the 2010 and 2020 censuses its population fell from 164 to 122 (-26%).

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

People over time

Fallon, census by census

010020002020Peak: 164

Peaked at 164 in 2010; 122 people lived here in 2020.

3 censuses, 2000–2020.

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

Timeline

Fallon, 1884 to 2010

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

  1. 19th century
  2. 1884Post officeThe Fallon post office opens
  3. 20th century
  4. 1983On the mapFirst mapped by the U.S. Geological Survey
  5. 21st century
  6. 2010CensusPopulation peaks at 164
By decade

Fallon, decade by decade

Today1 recent
MTMap-doton-Fallon2005MTMap-doton-Fallon
On the map

Fallon on the map in 1983

The U.S. Geological Survey’s map of Fallon.

Fallon on the 1983 USGS map1983Fallon 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 Fallon.

Every building

Fallon, building by building, 1916–1928

Fire insurance maps drew every building, what it was made of and what it was used for, so insurers could price the risk of fire. Pick a year, then a sheet.

Fallon fire insurance map, 1916, sheet 11916Sheet 1 of 1
Edition
Sheets
BrickWoodStone

Sanborn Map Company, via the Library of Congress. Editions published in 1930 or earlier, which are in the public domain.

On the National Register

1 historic place in Fallon

The country’s official list of buildings and places worth saving.

place listed
1
National Historic Landmarks
0
none yet
historic buildings protected
1
each building in a district counts
first listed
2010
Yellowstone River Bridge
Yellowstone River Bridge
Structures

Architectural styles listings

Continuous Warren through truss1
Yellowstone River BridgeContinuous Warren through truss

National Park Service, National Register of Historic Places. Photos from Wikimedia Commons, credited on each place’s page.

Famous people

Famous people close to Fallon

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

See all →
Adam MorrisonAmerican basketball player · b. 1984
Kamran InceAmerican composer · b. 1960
Mike PersonAmerican football player · b. 1988
Mason TobinAmerican baseball player · b. 1987
N
Norm ClarkeAmerican journalist · b. 1942
Places that used to be

Places now gone

Fallon’s post office has been open since 1884.

Gone or out of use
Fallon Schoolschool

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

Questions about Fallon’s history

What year was Fallon founded?

The Fallon post office opened in 1884, the earliest record of the town by name (U.S. post office records).

What is on the National Register in Fallon?

One place: the Yellowstone River Bridge (listed 2010).

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). How TownRatings grades history →

From Wikimedia Commons (1), the National Register of Historic Places (1), U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia), the US Post Offices dataset (Blevins & Helbock), the USGS Geographic Names Information System and Sanborn fire insurance maps (Library of Congress). Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.