Half of East San Gabriel’s homes were built after 1960
More historic than 22% of U.S. towns · #418 of 847 in California. What drives it
Most of East San Gabriel was built recently: 6% of its homes predate 1940 and the median home dates from 1960. Below: maps from 1896 on and the census since 1990.
On its age, its old homes and the National Register, East San Gabriel is more historic than 22% of U.S. towns, #418 of 847 in California. Its share of homes from before 1940 holds the grade up; its National Register listings pull it down.
C−
HistoryA character grade: shown, never part of East San Gabriel’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 East San Gabriel’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 two of the three inputs, so a change in either one moves the letter more than it would with three. The pre-1940 share (±2.0 points) is firm at this size.
Founding year: our sources. 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 East San Gabriel’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Every edition of the U.S. Geological Survey’s map of East San Gabriel. Tap a year, or press play to watch the town change.
1896Pasadena sheet · 1:62,500
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of East San Gabriel.
The story so far
East San Gabriel, in brief
Wikipedia doesn’t have a history of East San Gabriel yet. The photos, dates and memories neighbors add here are how it gets written.
East San Gabriel is an unincorporated community and census-designated place (CDP) in the San Gabriel Valley of Los Angeles County, California, United States. The population was 22,769 at the 2020 census, up from 14,874 at the 2010 census.
Between the 2010 and 2020 censuses its population grew from 14,874 to 22,769 (+53%).
Intro from Wikipedia. Population: U.S. Census Bureau.
East San Gabriel is more historic than 22% of U.S. towns, #418 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 East San Gabriel?
6% of East San Gabriel’s homes were built before 1940 (Census estimate, ±2.0 points), against a typical 3.4% for a California town; the median home was built in 1960.
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 (3), U.S. Geological Survey historical maps and U.S. Census counts (via Wikipedia). Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.
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