Founding year: the first Oroville post office (Blevins & Helbock, CC0).The full story ↓
History grade
What drives Oroville’s History grade
On its age, its old homes and the National Register, Oroville is more historic than 69% of U.S. towns, #59 of 847 in California. Its National Register listings hold the grade up; its age pulls it down.
B+
HistoryA character grade: shown, never part of Oroville’s overall grade.
Few California towns list much on the Register (a typical California town has 0.0 per 10,000 residents, the U.S. 2.4), so Oroville’s 10.6 sits above most of its state (92% of California towns have fewer) while its 21 historic buildings outnumber those of 80% of U.S. towns.
How sure. Graded on any two of the three inputs instead, the letter would range from C+ to A−. The pre-1940 share is a Census survey estimate (±3.0 points). The founding year is the first post office, not a stated founding date.
Founding year: the first post office (other dates in Quick answers). Homes: Census ACS 2020–24. National Register: National Park Service, May 2026 list; each listing counted once (boundary changes and added documentation belong to their listing), and a historic district counts its contributing buildings. How TownRatings grades history →
What stands out about Oroville’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Lost a third of its people between 1860 and 1870, then grew more than tenfold.
16 censuses, 1860–2020.
U.S. Census Bureau decennial counts, from the census table on Oroville’s Wikipedia page.
Every building
Oroville, building by building, 1884–1909
Fire insurance maps drew every building, what it was made of and what it was used for, so insurers could price the risk of fire. Pick a year, then a sheet.
Oroville is on the banks of the Feather River, which flows from the Sierra Nevada onto the flat floor of the California Central Valley. During the California Gold Rush, it was created as the Feather River's head of navigation to serve miners. The original inhabitants of Oroville were the Konkow subdivision of Maidu people. In their native language, the Oroville area is ʔópamtani.
The town was originally named "Ophir City", but was renamed Oroville when the first post office opened in 1854 (oro is Spanish for "gold"). The City of Oroville was incorporated on January 3, 1906.
Nothing in the archives for these yearsWeddings on Main Street, storms, parades, school pictures, the old store. If it’s in your family album, it belongs here.
The Oroville post office opened in 1854, the earliest record of the town by name (U.S. post office records).
How does Oroville rank for history?
Oroville is more historic than 69% of U.S. towns, #59 of 847 in California. The History grade combines the town’s founding era, the share of homes built before 1940 and its National Register listings. It’s a character grade, so it isn’t part of the overall grade. How it works.
What is on the National Register in Oroville?
5 listings: 5 buildings, among them the Oroville Chinese Temple (listed 1976, the first). 21 historic buildings in all.
How old are the homes in Oroville?
15% of Oroville’s homes were built before 1940 (Census estimate, ±3.0 points), against a typical 3.4% for a California town; the median home was built in 1967.
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).
From Wikimedia Commons (6), the Library of Congress (14), Wikidata (2), the National Register of Historic Places (5), Wikipedia, Wikidata and Wikipedia for famous people, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia), the US Post Offices dataset (Blevins & Helbock), the USGS Geographic Names Information System and Sanborn fire insurance maps (Library of Congress). Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.