More historic than 33% of U.S. towns · #303 of 847 in California. What drives it
Most of Costa Mesa was built recently: 2% of its homes predate 1940 and the median home dates from 1972. Below: maps from 1896 on and the census since 1950.
Founding year: Wikidata. First post office: 1888.The full story ↓
History grade
What drives Costa Mesa’s History grade
On its age, its old homes and the National Register, Costa Mesa is more historic than 33% of U.S. towns, #303 of 847 in California. Its age holds the grade up; its share of homes from before 1940 pulls it down.
C
HistoryA character grade: shown, never part of Costa Mesa’s overall grade.
Among the 400 U.S. cities of 100,000 or more, Costa Mesa ranks #293 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 Costa Mesa’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.
Newer cities are common at Costa Mesa’s size: in the typical U.S. city of 100,000 or more, 5% of homes predate 1940.
NoteThe founding year comes from Wikidata alone; no second source gives 1776.
How sure. Graded on any two of the three inputs instead, the letter would range from D to B−. The pre-1940 share (±0.5 points) is firm at this size.
Founding year: Wikidata (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 Costa Mesa’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Lost post offices, old corners and places now gone
Costa Mesa’s post office has been open since 1920. Two other post offices opened and closed inside today’s town.
Fairview
1888–1903
Harper
1909–1920
Costa Mesa
1920–today
18801950today
Hamlets and corners on the map
Cliff HavenCosta Mesa Mobile Home EstatesEl Nido Mobile Home EstatesGreenleaf Mobile Home ParkHoosier Trailer CourtIsland View Trailer ParkPaularinoPlay Port Mobile Home VillagePonderosa Mobile Home ParkRegal Mobile Club EstatesSanta Ana HeightsSnug Harbor Trailer ParkThurinTradewinds Trailer Village
Gone or out of use
Martins Landing FieldairportMonte Vista Schoolschool
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
Help out
Start Costa Mesa’s collection
The first neighbors to add old photos shape how Costa Mesa’s history is told.
Decades since 1900 with photos
00s10s20s30s40s50s60s70s80s90s
0 of 10 decades. The empty ones are waiting for someone’s album.
Members of the Tongva and Acjachemen nations long inhabited the area. The Tongva villages of Lupukngna, at least 3,000 years old, and the shared Tongva and Acjachemen village of Genga, at least 9,500 years old, were located in the area on the bluffs along the Santa Ana River.
After the 1769 expedition of Gaspar de Portolà, a Spanish expedition led by Junípero Serra named the area Vallejo de Santa Ana (Valley of Saint Anne). On November 1, 1776, Mission San Juan Capistrano became the area's first permanent European settlement in Alta California, New Spain.
In 1801, the Spanish Empire granted 62,500 acres (253 km2) to Jose Antonio Yorba, which he named Rancho San Antonio.
In 1776, according to Wikidata. Costa Mesa’s post office opened in 1888, and the census of 1950 counted 11,844 people here.
How does Costa Mesa rank for history?
Costa Mesa is more historic than 33% of U.S. towns, #303 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 Costa Mesa?
2% of Costa Mesa’s homes were built before 1940 (Census estimate), against a typical 3.4% for a California town; the median home was built in 1972.
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 (2), 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.