Founding year: the first Avalon post office (Blevins & Helbock, CC0). Wikidata: 1913.The full story ↓
History grade
What drives Avalon’s History grade
On its age, its old homes and the National Register, Avalon is more historic than 85% of U.S. towns, #20 of 847 in California. Its share of homes from before 1940 holds the grade up; its age pulls it down.
A−
HistoryA character grade: shown, never part of Avalon’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 Avalon’s 18.0 sits above most of its state (94% of California towns have fewer) while its 6 historic buildings outnumber those of 72% 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 is a Census survey estimate (±14.1 points). The founding year is the first post office, not a stated founding date; Wikidata gives 1913.
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 Avalon’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
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.
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.
Prior to the modern era, Avalon Bay was inhabited by people of the Gabrielino/Tongva tribe. The island was a major source of soapstone to the Tongva, who used the material to make stone vessels for cooking. The Tongva called the island Pimu or Pimugna and referred to themselves as the Pimugnans. However, by the 1830s, the entire island's native population had either died off, or had undergone forcible relocation to the mainland to work in the missions or as ranch hands for the many private land owners.
The Avalon post office opened in 1889, the earliest record of the town by name (U.S. post office records). Wikidata gives 1913.
How does Avalon rank for history?
Avalon is more historic than 85% of U.S. towns, #20 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 Avalon?
4 listings: 4 buildings, among them the Peter Gano House (listed 1983, the first). 6 historic buildings in all.
How old are the homes in Avalon?
47% of Avalon’s homes were built before 1940 (Census estimate, ±14.1 points), against a typical 3.4% for a California town; the median home was built in 1946.
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 (13), the Library of Congress (4), Wikidata (1), the National Register of Historic Places (4), 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.