Half of Mountain Green’s homes were built after 2010
Among the newest of U.S. towns · #111 of 119 in Utah. What drives it
Most of Mountain Green was built recently: 0.0% of its homes predate 1940 and the median home dates from 2010.
About Mountain Green’s history
How historic is Mountain Green?
Among the newest of U.S. towns, on its age, its old homes and the National Register.
What drives Mountain Green’s History grade
On its age, its old homes and the National Register, Mountain Green is among the newest of U.S. towns, #111 of 119 in Utah. Its National Register listings hold the grade up; its share of homes from before 1940 pulls it down.
Utah towns list more on the Register than most of the country (a typical Utah town has 3.0 per 10,000 residents, the U.S. 2.4), so Mountain Green’s 0.0 sits below most of its state (18% of Utah 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 →
Questions about Mountain Green’s history
How does Mountain Green rank for history?
Mountain Green is among the newest of U.S. towns, #111 of 119 in Utah. 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 Mountain Green?
0.0% of Mountain Green’s homes were built before 1940 (Census estimate, ±1.1 points), against a typical 2.8% for an Utah town; the median home was built in 2010.
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 USGS Geographic Names Information System. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.