Each edition grades its towns against each other only.
More historic than 4% of U.S. towns · #108 of 140 in Arizona. What drives it
Most of Summit was built recently: 0.0% of its homes predate 1940 and the median home dates from 1991. Below: maps from 1948 on.
More historic than 4% of U.S. towns, on its age, its old homes and the National Register.
On its age, its old homes and the National Register, Summit is more historic than 4% of U.S. towns, #108 of 140 in Arizona. Its National Register listings hold the grade up; its share of homes from before 1940 pulls it down.
Few Arizona towns list much on the Register (a typical Arizona town has 0.1 per 10,000 residents, the U.S. 2.4), so Summit’s 0.0 sits below most of its state (29% of Arizona 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 Summit’s history is told.
Wikipedia doesn’t have a history of Summit yet. The photos, dates and memories neighbors add here are how it gets written.
Summit is a census-designated place (CDP) in Pima County, Arizona, United States. The population was 3,702 at the 2000 census.
Between the 2010 and 2020 censuses its population fell from 5,372 to 4,724 (-12%).
Intro from Wikipedia. Population: U.S. Census Bureau.
Every edition of the U.S. Geological Survey’s map of Summit. 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 Summit.
Nobody well known was born in Summit itself, so here are the best known from just nearby.
Old hamlets and crossroads still carry their names on the map.
Places and cemeteries from the USGS Geographic Names Information System (2021).
Each neighbor’s History grade, on the same three inputs.
Summit is more historic than 4% of U.S. towns, #108 of 140 in Arizona. 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.
0.0% of Summit’s homes were built before 1940 (Census estimate), against a typical 0.4% for an Arizona town; the median home was built in 1991.
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 Wikimedia Commons (1), 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.
2014
