Gann Valley’s post office opened in 1885, and 1 of its places is on the National Register
How Gann Valley began
When was Gann Valley founded?
The Gann Valley post office opened in 1885, the earliest record of the town by name.
1 historic place in Gann Valley
The country’s official list of buildings and places worth saving.
National Park Service, National Register of Historic Places. Photos from Wikimedia Commons, credited on each place’s page.
Famous people close to Gann Valley
Nobody well known was born in Gann Valley itself, so here are the best known from just nearby.
Questions about Gann Valley’s history
What year was Gann Valley founded?
The Gann Valley post office opened in 1885, the earliest record of the town by name (U.S. post office records).
Memory lane
What the archives can’t tell you, neighbors can.
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 →