Round Mountain’s post office opened in 1857, and 1 of its places is on the National Register
Most of Round Mountain was built recently: 4% of its homes predate 1940 and the median home dates from 1983. Its Register listing is the Round Mountain Stage-Coach Inn and Stable. Below: maps from 1887 on and the census since 1990.
Every edition of the U.S. Geological Survey’s map of Round Mountain. Tap a year, or press play to watch the town change.
1887Blanco 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 Round Mountain.
People over time
Round Mountain, census by census
Peaked at 181 in 2010; 101 people lived here in 2020.
4 censuses, 1990–2020.
U.S. Census Bureau decennial counts, from the census table on Round Mountain’s Wikipedia page.
The story so far
Round Mountain, in brief
Wikipedia doesn’t have a history of Round Mountain yet. The photos, dates and memories neighbors add here are how it gets written.
Its first post office opened in 1857. Between the 2010 and 2020 censuses its population fell from 181 to 101 (-44%).
Timeline
Round Mountain, 1857 to 2010
Woven from the archive, old maps, post office records, the National Register and the people born here.
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 Wikimedia Commons (2), the National Register of Historic Places (1), U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia), 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.