More historic than 9% of U.S. towns · #705 of 847 in California. What drives it
Most of Greenfield was built recently: 2% of its homes predate 1940 and the median home dates from 1996. Below: 12 old photos and papers, maps from 1940 on, and the census since 1950.
Founding year: the first Greenfield post office (Blevins & Helbock, CC0). Wikidata: 1947.The full story ↓
History grade
What drives Greenfield’s History grade
On its age, its old homes and the National Register, Greenfield is more historic than 9% of U.S. towns, #705 of 847 in California. Its National Register listings hold the grade up; its age pulls it down.
D
HistoryA character grade: shown, never part of Greenfield’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 Greenfield’s 0.0 sits below most of its state (31% of California towns have fewer) while its 0 listings outnumber those of 23% of U.S. towns.
How sure. Graded on any two of the three inputs instead, the letter would still be D. The pre-1940 share (±1.6 points) is firm at this size. The founding year is the first post office, not a stated founding date; Wikidata gives 1947.
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 Greenfield’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
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.
In 1902, the California Home Extension Association, Greenfield, purchased 4,000 acres (1,600 ha) of land that had been part of Rancho Arroyo Seco, a Mexican land grant deeded to Joaquín de la Torre in 1840. The land was put up for sale at a public drawing in Los Angeles in 1905. Buyers could purchase an acre with water rights for about $37.50. A purchase of 2.5 acres (1.0 ha) came with an added benefit — a lot in town.
The Greenfield post office opened in 1905, the earliest record of the town by name (U.S. post office records). Wikidata gives 1947.
How does Greenfield rank for history?
Greenfield is more historic than 9% of U.S. towns, #705 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.
How old are the homes in Greenfield?
2% of Greenfield’s homes were built before 1940 (Census estimate, ±1.6 points), against a typical 3.4% for a California town; the median home was built in 1996.
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 the Library of Congress (12), 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.
1939
1939
1939
1939
1939
1939
1939
1939
1939
1939
1939
1939
