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History · Casmalia

Casmalia’s post office opened in 1896, and 54% of its homes were built before 1940

Below: maps from 1947 on.

1896first post office
0on the National Register
54%homes built before 1940
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Photo: Missvain · CC BY 4.0
Quick answers

How Casmalia began

When was Casmalia founded?

1896

The Casmalia post office opened in 1896, the earliest record of the town by name.

2020 census: 147130 years
Founding year: the first Casmalia post office (Blevins & Helbock, CC0).The full story ↓

What stands out about Casmalia’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 Casmalia are in the public archives yet. The rest are in attics and albums.Old housesHalf of Casmalia’s homes were built before 1938.
★ What stands out · Help out

Start Casmalia’s collection

The first neighbors to add old photos shape how Casmalia’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

How Casmalia came to be

From Wikipedia’s history of Casmalia.

Read it all →

Casmalia is located on the 1840 Mexican land grant, Rancho Casmalia. The formal town was founded by Antonio Tognazzini in the mid-1890s and was then named Someo, after the village of origin of the Tognazzini family, Someo, Switzerland. When the post office was opened, however, it was named Casmalia, rather than Someo, because of a name conflict with another California town and the name, Someo, was eventually dropped.

Text from Wikipedia, licensed CC BY-SA 4.0.

By decade

Casmalia, decade by decade

Today4 recent
Hills north of Casmalia - September 2023 - Sarah Stierch2023Hills north of Casmalia - September 2023 - Sarah Stie…Casmalia - September 2023 - Sarah Stierch2023Casmalia - September 2023 - Sarah StierchCars in Casmalia - September 2023 - Sarah Stierch 022023Cars in Casmalia - September 2023 - Sarah Stierch 02Cars in Casmalia - September 2023 - Sarah Stierch 012023Cars in Casmalia - September 2023 - Sarah Stierch 01
On the map

Casmalia on the map, 1947 to 1982

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

Casmalia on the 1947 USGS mapCasmalia on the 1959 USGS mapCasmalia on the 1974 USGS mapCasmalia on the 1982 USGS map1947Casmalia 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 Casmalia.

Questions about Casmalia’s history

What year was Casmalia founded?

The Casmalia post office opened in 1896, 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 →
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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 (4), Wikipedia, 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.