Each edition grades its towns against each other only.
More historic than 40% of U.S. towns. What drives it
Below: maps from 1963 on.
More historic than 40% of U.S. towns, on its age, its old homes and the National Register.
On its age, its old homes and the National Register, Spencerville is more historic than 40% of U.S. towns. Its share of homes from before 1940 holds the grade up; its National Register listings pull it down.
New Mexico towns list about as much on the Register as the country (a typical New Mexico town has 2.2 per 10,000 residents, the U.S. 2.4), so Spencerville’s 0.0 sits below most of its state (28% of New Mexico towns have fewer) while its 0 listings outnumber those of 23% of U.S. towns.
Founding year: our sources. 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 →
Read from the archive, the National Register and the record. The page puts what stands out first.
The first neighbors to add old photos shape how Spencerville’s history is told.
Wikipedia doesn’t have a history of Spencerville yet. The photos, dates and memories neighbors add here are how it gets written.
Spencerville is a census-designated place in San Juan County, New Mexico, United States. As of the 2020 census, Spencerville had a population of 1,138.
Between the 2010 and 2020 censuses its population fell from 1,258 to 1,138 (-10%).
Intro from Wikipedia. Population: U.S. Census Bureau.
Weddings on Main Street, storms, parades, school pictures, the old store. If it’s in your family album, it belongs here.
Every edition of the U.S. Geological Survey’s map of Spencerville. Tap a year, or press play to watch the town change.
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Spencerville.
Nobody well known was born in Spencerville itself, so here are the best known from just nearby.
Places and cemeteries from the USGS Geographic Names Information System (2021).
Each neighbor’s History grade, on the same three inputs.
Spencerville is more historic than 40% of U.S. towns. 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.
16% of Spencerville’s homes were built before 1940 (Census estimate, ±16.7 points), against a typical 2.3% for a New Mexico town; the median home was built in 1982.
What the archives can’t tell you, neighbors can.
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 U.S. Geological Survey historical maps 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.
