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History · San Pedro

San Pedro’s post office opened in 1881

Most of San Pedro was built recently: 0.0% of its homes predate 1940 and the median home dates from 1992. Below: maps from 1954 on.

1881first post office
0on the National Register
0.0%homes built before 1940
Quick answers

How San Pedro began

When was San Pedro founded?

1881

The San Pedro post office opened in 1881, the earliest record of the town by name. Another post office, Carnahan (1927), opened inside today’s town and later closed.

2020 census: 205145 years
Founding year: the first San Pedro post office (Blevins & Helbock, CC0).

What stands out about San Pedro’s past

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

★ What stands out · Help out

Start San Pedro’s collection

The first neighbors to add old photos shape how San Pedro’s history is told.

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

San Pedro, in brief

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

San Pedro is an unincorporated community and census-designated place in Santa Fe County, New Mexico, United States. As of the 2020 census, San Pedro had a population of 205. New Mexico State Road 344 passes through the community.

Its first post office opened in 1881. Between the 2010 and 2020 censuses its population grew from 184 to 205 (+11%).

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

Timeline

San Pedro, 1881 to 1954

Woven from the archive, old maps, post office records, the National Register and the people born here.

  1. 19th century
  2. 1881Post officeThe San Pedro post office opens
  3. 20th century
  4. 1918Post officeThe San Pedro post office closes
  5. 1927Post officeThe Carnahan post office opens
  6. 1930Post officeThe Carnahan post office closes
  7. 1954On the mapFirst mapped by the U.S. Geological Survey
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.
Add from your album
On the map

San Pedro on the map, 1954 to 1990

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

San Pedro on the 1954 USGS mapSan Pedro on the 1976 USGS mapSan Pedro on the 1990 USGS map1954San Pedro 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 San Pedro.

Famous people

Famous people close to San Pedro

Nobody well known was born in San Pedro itself, so here are the best known from just nearby.

See all →
Places that used to be

Lost post offices and places now gone

San Pedro had its own post office from 1881 to 1918. Another post office, Carnahan, opened and closed inside today’s town.

San Pedro
1881–1918
Carnahan
1927–1930
18801950today
Gone or out of use
Abe LincolnmineAnaconda MinemineBeautiful Boy MinemineBelchermineBonanzamineC and CmineCarltonmineCarnahanmineClevelandmineColoradomineColusamineContentionmineCopper BellemineDrummondmineEllamineFairview MinemineFashodiemineFuzzy Jim Claimmine

US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).

Stories next door

History across the town line

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

Questions about San Pedro’s history

What year was San Pedro founded?

The San Pedro post office opened in 1881, 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 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.