Antietam’s post office opened in 1889, and 42% of its homes were built before 1940
1 place in town is on the National Register, among them a historic district with 24 buildings.
How Antietam began
When was Antietam founded?
The Antietam post office opened in 1889, the earliest record of the town by name.
1 listing protects 24 historic buildings
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.
Lost post offices and places now gone
Antietam had its own post office from 1889 to 1903.
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
Questions about Antietam’s history
What year was Antietam founded?
The Antietam post office opened in 1889, the earliest record of the town by name (U.S. post office records).
What is on the National Register in Antietam?
One place: the Antietam Iron Furnace Site and Antietam Village (listed 1975).
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.