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–Not graded
History · Sereno del Mar

Half of Sereno del Mar’s homes were built after 1990

Most of Sereno del Mar was built recently: 0.0% of its homes predate 1940 and the median home dates from 1990. Below: maps from 1943 on.

0on the National Register
0.0%homes built before 1940
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What stands out about Sereno del 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 Sereno del Mar are in the public archives yet. The rest are in attics and albums.
★ What stands out · Help out

Start Sereno del Mar’s collection

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

Decades since 1900 with photos
00s10s20s30s40s50s60s70s80s90s
0 of 10 decades. The empty ones are waiting for someone’s album.
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The story so far

Sereno del Mar, in brief

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

Sereno del Mar (Spanish for "Serene of the Sea") is a census-designated place (CDP) in Sonoma County, California, United States. Sereno del Mar sits at an elevation of 190 feet (58 m). The 2020 United States census reported Sereno del Mar's population was 107.

Between the 2010 and 2020 censuses its population fell from 126 to 107 (-15%).

Intro from Wikipedia. Population: U.S. Census Bureau.

By decade

No old photos in the archives yet

Weddings on Main Street, storms, parades, school pictures, the old store. If it’s in your family album, it belongs here.

Be the first to add onePhotograph a print flat, in daylight, no flash.
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On the map

Sereno del Mar on the map, 1943 to 1979

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

Sereno del Mar on the 1943 USGS mapSereno del Mar on the 1979 USGS map1943Duncans Mills sheet · 1:24,000

U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Sereno del Mar.

Famous people

Famous people close to Sereno del Mar

Nobody well known was born in Sereno del Mar itself, so here are the best known from just nearby.

See all →
Rebecca De MornayAmerican actress · b. 1959
Julie LondonAmerican actress and singer · b. 1926
Ariana RichardsAmerican artist · b. 1979
Ralph Waldo RoseAmerican track and field athlete · b. 1884
Jussie SmollettAmerican actor · b. 1982
Hazel Hotchkiss WightmanUS tennis and badminton player · b. 1886
Stories next door

History across the town line

Each neighbor’s History grade, on the same three inputs.

CarmetIts storynot graded: under 1,000 residents or part of its town

Questions about Sereno del Mar’s history

Memory lane

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

Town Square →
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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 U.S. Geological Survey historical maps. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.