Santa Clarita was first counted by the census in 1950, and 1 of its places is on the National Register
More historic than 16% of U.S. towns · #564 of 847 in California. What drives it
1 place in town is on the National Register, among them a historic district with 2 buildings. Most of Santa Clarita was built recently: 1% of its homes predate 1940 and the median home dates from 1987. Below: 4 old photos and papers, maps from 1903 on, and the census since 1950.
From Santa Clarita’s archive · credits on each photo
Quick answers
How Santa Clarita began
When was Santa Clarita founded?
1950
Santa Clarita first appears in the census in 1950. Two smaller post offices, Lyon's Station (1874) and Thompson (1888), opened inside today’s city and later closed.
First census: 2,895 in 19502020 census: 228,67376 years
How historic is Santa Clarita?
C−
More historic than 16% of U.S. towns, on its age, its old homes and the National Register.
On its age, its old homes and the National Register, Santa Clarita is more historic than 16% of U.S. towns, #564 of 847 in California. Its National Register listings hold the grade up; its age pulls it down.
C−
HistoryA character grade: shown, never part of Santa Clarita’s overall grade.
Among the 400 U.S. cities of 100,000 or more, Santa Clarita ranks #363 on History.
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 Santa Clarita’s 0.1 sits near the middle of its state (63% of California towns have fewer) while its 2 historic buildings outnumber those of 60% of U.S. towns.
Newer cities are common at Santa Clarita’s size: in the typical U.S. city of 100,000 or more, 5% of homes predate 1940.
How sure. Graded on any two of the three inputs instead, the letter would range from D− to C. The pre-1940 share (±0.3 points) is firm at this size.
Founding year: the first census (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 Santa Clarita’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 Santa Clarita. Tap a year, or press play to watch the town change.
1903Santa Susana 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 Santa Clarita.
The Santa Clarita Valley has been settled for millennia before European arrival. The oldest archaeological site in the area dates back to roughly 3000 BC. About AD 450, the Tataviam arrived, displacing the Chumash people who previously inhabited the area. The Tataviam lived in approximately 20 villages in the valley and surrounding areas including Piru, Agua Dulce, Elizabeth Lake, and Tochonanga.
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 Santa Clarita post office opened in 1950, the earliest record of the town by name (U.S. post office records). Wikidata gives 1987.
How does Santa Clarita rank for history?
Santa Clarita is more historic than 16% of U.S. towns, #564 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 Santa Clarita?
One place: the Pioneer Oil Refinery (listed 2020).
How old are the homes in Santa Clarita?
1% of Santa Clarita’s homes were built before 1940 (Census estimate), against a typical 3.4% for a California town; the median home was built in 1987.
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 (18), the National Register of Historic Places (1), 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) 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.