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History · Loma Mar

Loma Mar’s post office opened in 1931, and 53% of its homes were built before 1940

Below: maps from 1940 on.

1931first post office
0on the National Register
53%homes built before 1940
Add an old photoShare a memory
Quick answers

How Loma Mar began

When was Loma Mar founded?

1931

The Loma Mar post office opened in 1931, the earliest record of the town by name.

2020 census: 13495 years
Founding year: the first Loma Mar post office (Blevins & Helbock, CC0).

What stands out about Loma Mar’s past

Read from the archive, the National Register and the record. The page puts what stands out first.

A history waiting to be writtenNo old photos of Loma Mar are in the public archives yet. The rest are in attics and albums.Old housesHalf of Loma Mar’s homes were built before 1938.
★ What stands out · Help out

Start Loma Mar’s collection

The first neighbors to add old photos shape how Loma Mar’s history is told.

Decades since 1900 with photos
00s10s20s30s40s50s60s70s80s90s
0 of 10 decades. The empty ones are waiting for someone’s album.
Share a family photoSign in to add one+10
The story so far

Loma Mar, in brief

Wikipedia doesn’t have a history of Loma Mar yet. The photos, dates and memories neighbors add here are how it gets written.

Its first post office opened in 1931. Between the 2010 and 2020 censuses its population grew from 113 to 134 (+19%).

By decade

Loma Mar, decade by decade

Today1 recent
Loma Mar California2005Loma Mar California
On the map

Loma Mar on the map, 1940 to 1991

Every edition of the U.S. Geological Survey’s map of Loma Mar. Tap a year, or press play to watch the town change.

Loma Mar on the 1940 USGS mapLoma Mar on the 1955 USGS mapLoma Mar on the 1961 USGS mapLoma Mar on the 1991 USGS map1940Halfmoon Bay 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 Loma Mar.

Questions about Loma Mar’s history

What year was Loma Mar founded?

The Loma Mar post office opened in 1931, the earliest record of the town by name (U.S. post office records).

Memory lane

What the archives can’t tell you, neighbors can.

Town Square →
Start a conversation
Sources

Where this page comes from

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). How TownRatings grades history →

From Wikimedia Commons (1), U.S. Geological Survey historical maps, 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.