Founding year: Wikidata; Wikipedia’s history section gives the same year. First post office: 1910.
History grade
What drives Ucon’s History grade
On its age, its old homes and the National Register, Ucon is more historic than 26% of U.S. towns. Its share of homes from before 1940 holds the grade up; its National Register listings pull it down.
C
HistoryA character grade: shown, never part of Ucon’s overall grade.
Idaho towns list more on the Register than most of the country (a typical Idaho town has 8.4 per 10,000 residents, the U.S. 2.4), so Ucon’s 0.0 sits below most of its state (14% of Idaho towns have fewer) while its 0 listings outnumber those of 23% of U.S. towns.
How sure. Graded on any two of the three inputs instead, the letter would range from D to C+. The pre-1940 share is a Census survey estimate (±4.9 points). Two sources give 1883.
Founding year: Wikidata (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 →
What stands out about Ucon’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Wikipedia doesn’t have a history of Ucon yet. The photos, dates and memories neighbors add here are how it gets written.
Ucon is a city in Bonneville County, Idaho, United States. It is part of the Idaho Falls, Idaho Metropolitan Statistical Area. The population was 1,160 at the 2020 census. Ucon was first settled in 1883.
Ucon was established in 1883. Between the 2010 and 2020 censuses its population grew from 1,108 to 1,160 (+5%).
Intro from Wikipedia. Population: U.S. Census Bureau.
Timeline
Ucon, 1883 to 1948
Woven from the archive, old maps, post office records, the National Register and the people born here.
Every edition of the U.S. Geological Survey’s map of Ucon. Tap a year, or press play to watch the town change.
1948Ucon sheet · 1:24,000
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Ucon.
People over time
Ucon, census by census
Grew from 364 people in 1920 to 1,160 in 2020, 3 times over.
11 censuses, 1920–2020.
U.S. Census Bureau decennial counts, from the census table on Ucon’s Wikipedia page.
Questions about Ucon’s history
What year was Ucon founded?
In 1883, according to Wikidata and Wikipedia’s history of the town. Ucon’s post office opened in 1910, and the census of 1920 counted 364 people here.
How does Ucon rank for history?
Ucon is more historic than 26% 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.
How old are the homes in Ucon?
10% of Ucon’s homes were built before 1940 (Census estimate, ±4.9 points), against a typical 8.5% for an Idaho town; the median home was built in 1976.
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 (2), Wikidata and Wikipedia for famous people, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia), 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.
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