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History · Unionville

30% of Unionville’s homes were built before 1940

Below: maps from 1906 on.

0on the National Register
30%homes built before 1940
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What stands out about Unionville’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 Unionville are in the public archives yet. The rest are in attics and albums.On the map since 19064 editions of the USGS map, 1906 to 1990. Watch Unionville change.Old housesHalf of Unionville’s homes were built before 1952.
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Start Unionville’s collection

The first neighbors to add old photos shape how Unionville’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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On the map

Unionville on the map, 1906 to 1990

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

Unionville on the 1906 USGS mapUnionville on the 1953 USGS mapUnionville on the 1969 USGS mapUnionville on the 1990 USGS map1906Sewickley sheet · 1:62,500

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

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.

Be the first to add onePhotograph a print flat, in daylight, no flash.
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Questions about Unionville’s history

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. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.