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–Not graded
History · Dennis

Half of Dennis’ homes were built after 1987

Most of Dennis was built recently: 0.0% of its homes predate 1940 and the median home dates from 1987. Below: maps from 1907 on.

0on the National Register
0.0%homes built before 1940
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What stands out about Dennis’ 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 Dennis are in the public archives yet. The rest are in attics and albums.On the map since 19073 editions of the USGS map, 1907 to 1986. Watch Dennis change.
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Start Dennis’s collection

The first neighbors to add old photos shape how Dennis’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

Dennis on the map, 1907 to 1986

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

Dennis on the 1907 USGS mapDennis on the 1971 USGS mapDennis on the 1986 USGS map1907Wyandotte sheet · 1:125,000

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

The story so far

Dennis, in brief

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

Dennis is an unincorporated community and census-designated place (CDP) in Delaware County, Oklahoma, near Grand Lake. As of the 2020 census, Dennis had a population of 221. The Dennis Post Office existed from March 25, 1914, until January 31, 1956. It is said to be named for a local resident, Peter Dennis.

Between the 2010 and 2020 censuses its population grew from 195 to 221 (+13%).

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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Stories next door

History across the town line

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

ZenaIts storynot graded: under 1,000 residents or part of its town

Questions about Dennis’ history

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 U.S. Geological Survey historical maps. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.