Portland’s post office opened in 1878, and 1 of its places is on the National Register
Most of Portland was built recently: 0.0% of its homes predate 1940 and the median home dates from 1978. Its Register listing is the George Jackson House.
How Portland began
When was Portland founded?
The Portland post office opened in 1878, the earliest record of the town by name.
1 historic place in Portland
The country’s official list of buildings and places worth saving.
Architectural styles listings
National Park Service, National Register of Historic Places. Photos from Wikimedia Commons, credited on each place’s page.
Lost post offices
Portland had its own post office from 1878 to 1896.
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
Questions about Portland’s history
What year was Portland founded?
The Portland post office opened in 1878, the earliest record of the town by name (U.S. post office records).
What is on the National Register in Portland?
One place: the George Jackson House (listed 1996).
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 →
From the National Register of Historic Places (1), 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.