Mariah Hill’s post office opened in 1862
Most of Mariah Hill was built recently: 8% of its homes predate 1940 and the median home dates from 1966.
How Mariah Hill began
When was Mariah Hill founded?
The Mariah Hill post office opened in 1862, the earliest record of the town by name.
Questions about Mariah Hill’s history
What year was Mariah Hill founded?
The Mariah Hill post office opened in 1862, 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 →