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History · Arnold Township

Arnold Township’s post office opened in 1877, and 24% of its homes were built before 1940

1 place in town is on the National Register. Below: maps from 1972 on and the census since 1910.

1877first post office
1on the National Register
24%homes built before 1940
Quick answers

How Arnold Township began

When was Arnold Township founded?

1877

The Arnold Township post office opened in 1877, the earliest record of the town by name. Three smaller post offices, Milldale (1883), Loyal (1907) and Finchville (1914), opened inside today’s town and later closed.

First census: 231 in 19102020 census: 738149 years
Founding year: the first Arnold Township post office (Blevins & Helbock, CC0).The full story ↓

What stands out about Arnold 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 Arnold Township’s collection

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

Decades since 1900 with photos
00s10s20s30s40s50s60s70s80s90s
0 of 10 decades. The empty ones are waiting for someone’s album.
Places that used to be

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

Three other post offices opened and closed inside today’s town.

Milldale
1883–1914
Loyal
1907–1914
Finchville
1914–1935
18801950today
Hamlets and corners on the map
FinchvillePleasant Hill
Gone or out of use
Cedar Grove SchoolschoolFinchville Post Officepost officeFinchville SchoolschoolLoyal Post Officepost officeLoyal Schoolschool
2cemeteries and burying grounds inside Arnold Township
ArnoldPowell Canyon

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

People over time

Arnold Township, census by census

02004006008001,000192019401960198020002020Peak: 936

Peaked at 936 in 1950; 592 people lived here in 2020.

12 censuses, 1910–2020.

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

The story

How Arnold Township came to be

From Wikipedia’s history of Arnold Township.

Read it all →

Arnold was laid out and platted in 1883 in anticipation that the railroad would soon be extended to that point. However, the railroad failed to materialize and Arnold grew slowly until the railroad finally arrived in 1912.

Text from Wikipedia, licensed CC BY-SA 4.0.

Timeline

Arnold Township, 1883 to 1972

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

  1. 19th century
  2. 1883Post officeThe Milldale post office opens
  3. 20th century
  4. 1907Post officeThe Loyal post office opens
  5. 1914Post officeThe Milldale post office closes
  6. 1914Post officeThe Loyal post office closes
  7. 1914Post officeThe Finchville post office opens
  8. 1935Post officeThe Finchville post office closes
  9. 1950CensusPopulation peaks at 936
  10. 1972On the mapFirst mapped by the U.S. Geological Survey
By decade

Arnold Township, decade by decade

On the map

Arnold Township on the map, 1972 to 1985

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

Arnold Township on the 1972 USGS mapArnold Township on the 1985 USGS map1972Arnold 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 Arnold Township.

On the National Register

1 historic place in Arnold Township

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

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

Stories next door

History across the town line

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

Questions about Arnold Township’s history

What year was Arnold Township founded?

The Arnold Township post office opened in 1877, 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 →
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 (8), Wikidata (1), 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.