Photo: Gary Halvorson, Oregon State Archives · CC BY 4.0
Quick answers
How Lonerock began
When was Lonerock founded?
1875
The Lonerock post office opened in 1875, the earliest record of the town by name. Wikidata gives 1901. Another post office, Lone Rock (1875), opened inside today’s city and later closed.
First census: 70 in 19102020 census: 25151 years
Founding year: the first Lonerock post office (Blevins & Helbock, CC0). Wikidata: 1901.The full story ↓
What stands out about Lonerock’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
The settlement began in the early 1870s, as a service center for the surrounding ranches. It was platted in 1882 as "Lone Rock", named for an unusual, 35-foot (11 m)-high rock that still stands in the town near the old Methodist church. The U.S. Postal Service had a preference for one-word names, so name of the post office was "Lonerock", which eventually became the community's official name. The city's population grew from 68 in 1900 to 70 in 1910, 73 in 1920, to a high of 82 in 1930. By 1940, Lonerock's population dwindled to 46, dropped to 38 in 1950, 31 in 1960, and to 12 residents in 1970. The population increased to 26 citizens in 1980, before falling to 11 in the 1990 census.
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 (7), Wikipedia, 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.