Isleta’s post office opened in 1882, and 22% of its homes were built before 1940
More historic than 63% of U.S. towns. What drives it
1 place in town is on the National Register, among them a historic district with 1 buildings.
How Isleta began
When was Isleta founded?
The Isleta post office opened in 1882, the earliest record of the town by name.
How historic is Isleta?
More historic than 63% of U.S. towns, on its age, its old homes and the National Register.
What drives Isleta’s History grade
On its age, its old homes and the National Register, Isleta is more historic than 63% of U.S. towns. Its share of homes from before 1940 holds the grade up; its age pulls 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 Isleta’s 9.6 sits above most of its state (73% of New Mexico towns have fewer) while its 1 listings outnumber those of 51% of U.S. towns.
Founding year: the first post office (other dates in Quick answers). 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 →
1 historic place in Isleta
The country’s official list of buildings and places worth saving.
National Park Service, National Register of Historic Places. Photos from Wikimedia Commons, credited on each place’s page.
Questions about Isleta’s history
What year was Isleta founded?
The Isleta post office opened in 1882, the earliest record of the town by name (U.S. post office records).
How does Isleta rank for history?
Isleta is more historic than 63% 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.
What is on the National Register in Isleta?
One place: the Isleta Pueblo (listed 1975).
How old are the homes in Isleta?
22% of Isleta’s homes were built before 1940 (Census estimate, ±11.8 points), against a typical 2.3% for a New Mexico town; the median home was built in 1982.
Memory lane
What the archives can’t tell you, neighbors can.
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).
From the National Register of Historic Places (1), 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.