Benicia’s post office opened in 1849, and 11 of its places are on the National Register
More historic than 77% of U.S. towns · #38 of 847 in California. What drives it
Most of Benicia was built recently: 6% of its homes predate 1940 and the median home dates from 1981. 11 places in town are on the National Register, among them two historic districts with 23 buildings between them. Below: 4 old photos and papers, maps from 1886 on, and the census since 1880.
The Benicia post office opened in 1849, the earliest record of the town by name.
First census: 1,794 in 18802020 census: 27,131177 years
How did Benicia get its name?
Benicia was named for the General's wife, Francisca Benicia Carillo de Vallejo, a member of the Carrillo family of California, a prominent Californio dynasty.
More on the name
The General intended that the city be named "Francisca" after his wife, but this name was dropped when the former city of "Yerba Buena" changed its name to "San Francisco," so her second given name was used instead.
How historic is Benicia?
A−
More historic than 77% of U.S. towns, on its age, its old homes and the National Register.
On its age, its old homes and the National Register, Benicia is more historic than 77% of U.S. towns, #38 of 847 in California. Its National Register listings hold the grade up; its share of homes from before 1940 pulls it down.
A−
HistoryA character grade: shown, never part of Benicia’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 Benicia’s 11.6 sits above most of its state (92% of California towns have fewer) while its 31 historic buildings outnumber those of 82% of U.S. towns.
How sure. Graded on any two of the three inputs instead, the letter would range from B− to A. The pre-1940 share (±2.3 points) is firm at this size. 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 Benicia’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
The City of Benicia was founded on May 19, 1847, by Dr. Robert Semple, Thomas O. Larkin, and Comandante General Mariano Guadalupe Vallejo, on land donated to them by General Vallejo in December 1846. It was named for the General's wife, Francisca Benicia Carillo de Vallejo, a member of the Carrillo family of California, a prominent Californio dynasty. The General intended that the city be named "Francisca" after his wife, but this name was dropped when the former city of "Yerba Buena" changed its name to "San Francisco," so her second given name was used instead. In his memoirs, William Tecumseh Sherman contended that Benicia was "the best natural site for a commercial city" in the region.
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.
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.
Benicia Arsenal and BarracksmilitaryCalifornia HousebuildingMills CollegeschoolMills Elementary SchoolschoolPeabody HospitalhospitalSaint Augustines CollegeschoolSaint Catherines AcademyschoolSaint Marys College of the PacificschoolTurner Shipyardslocale
3cemeteries and burying grounds inside Benicia
Benicia CityMilitarySaint Dominics
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
Stories next door
History across the town line
Each neighbor’s History grade, on the same three inputs.
The Benicia post office opened in 1849, the earliest record of the town by name (U.S. post office records).
How does Benicia rank for history?
Benicia is more historic than 77% of U.S. towns, #38 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 Benicia?
11 listings: 7 buildings, among them the Benicia Capitol State Historic Park (listed 1971, the first), 2 historic districts, the Benicia Arsenal and the Benicia City Cemetery, with 23 contributing buildings, 1 site, and 1 structure. 31 historic buildings in all.
How old are the homes in Benicia?
6% of Benicia’s homes were built before 1940 (Census estimate, ±2.3 points), against a typical 3.4% for a California town; the median home was built in 1981.
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 (4), Wikidata (2), the National Register of Historic Places (11), 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.
1850