Half of Santa Teresa’s homes were built after 1991
More historic than 4% of U.S. towns · #62 of 73 in New Mexico. What drives it
Most of Santa Teresa was built recently: 0.0% of its homes predate 1940 and the median home dates from 1991. Below: 4 old photos and papers and maps from 1955 on.
On its age, its old homes and the National Register, Santa Teresa is more historic than 4% of U.S. towns, #62 of 73 in New Mexico. Its National Register listings hold the grade up; its share of homes from before 1940 pulls it down.
D−
HistoryA character grade: shown, never part of Santa Teresa’s overall grade.
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 Santa Teresa’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.
How sure. Graded on two of the three inputs, so a change in either one moves the letter more than it would with three. The pre-1940 share (±0.8 points) is firm at this size.
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 →
What stands out about Santa Teresa’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
In 2015, the community of Santa Teresa petitioned the Doña Ana County Board of Commissioners to incorporate it as a city. When Sunland Park proposed annexing Santa Teresa, every Board member agreed that Sunland Park had no jurisdiction over Santa Teresa, whereupon Sunland Park filed an appeal to that decision with the New Mexico Supreme Court.
Santa Teresa is more historic than 4% of U.S. towns, #62 of 73 in New Mexico. 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.
How old are the homes in Santa Teresa?
0.0% of Santa Teresa’s homes were built before 1940 (Census estimate), against a typical 2.3% for a New Mexico town; the median home was built in 1991.
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 Wikimedia Commons (30), Wikipedia, 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.