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History · Calcium

Calcium’s post office opened in 1911, and 16% of its homes were built before 1940

1911first post office
0on the National Register
16%homes built before 1940
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Quick answers

How Calcium began

When was Calcium founded?

1911

The Calcium post office opened in 1911, the earliest record of the town by name.

2020 census: 3,573115 years
Founding year: the first Calcium post office (Blevins & Helbock, CC0).

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

The first neighbors to add old photos shape how Calcium’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

Calcium, in brief

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

Calcium is a census-designated place (CDP) in Jefferson County, New York, United States. The population was 3,573 as of the 2020 census. The CDP is in the town of Le Ray and includes the hamlets of Calcium and Sanfords Four Corners. The town was renamed Calcium in 1911 at the request of local inventor Madison Cooper after the calcium chloride used in his patented refrigeration plants. Historic landmarks include the stone house at the intersection of State Route 342 and County Route 138 that once served as the post office for the area, and the Calcium Community Church at the same intersection. The church was built in 1853 by a group of at least three different denominations, including Method…

Its first post office opened in 1911. Between the 2010 and 2020 censuses its population grew from 3,491 to 3,573 (+2%).

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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Famous people

Famous people close to Calcium

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

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John CarpenterAmerican filmmaker, composer and actor · b. 1948
Allen DullesFirst civilian and longest-serving Director of … · b. 1893
Melvil DeweyAmerican librarian · b. 1851
Robert LansingAmerican politician · b. 1864
Richard GriecoFull name: Richard John Grieco, Jr.; b. 3/23/65… · b. 1965
Frank Winfield WoolworthAmerican businessman · b. 1852
Stories next door

History across the town line

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

Fort Drum1 historic placenot graded: under 1,000 residents or part of its townPameliaIts storyB−Le Ray2 historic placesB

Questions about Calcium’s history

What year was Calcium founded?

The Calcium post office opened in 1911, 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 →