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.
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.
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.
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.