Most of Sugar City was built recently: 0.3% of its homes predate 1940 and the median home dates from 1997. Below: 6 old photos and papers, maps from 1909 on, and the census since 1910.
Founding year: Wikidata. First post office: 1950.The full story ↓
History grade
What drives Sugar City’s History grade
On its age, its old homes and the National Register, Sugar City is among the newest of U.S. towns. 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 Sugar City’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 Sugar City’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.
NoteThe founding year comes from Wikidata alone; no second source gives 1903.
How sure. Graded on any two of the three inputs instead, the letter would still be D−. The pre-1940 share (±0.5 points) is firm at this size.
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 →
Sugar City was a company town for the Fremont County Sugar Company, which was part of the Utah-Idaho Sugar Company, supporting a sugar beet processing factory built in 1903–1904. Since it was created to support the factory, construction workers and early factory families were housed in tents, leading to the nickname "Rag Town". By 1904, the town consisted of 35 houses, two stores, a hotel, an opera house, several boarding houses, two lumber yards, a meat market, and a schoolhouse. The first Mormon ward was the Sugar City Ward, with Bishop Mark Austin. One of his counselors was James Malone, a construction engineer for E. H. Dyer, who was not a Mormon.
Nothing in the archives for these yearsWeddings on Main Street, storms, parades, school pictures, the old store. If it’s in your family album, it belongs here.
Nothing in the archives for these yearsWeddings on Main Street, storms, parades, school pictures, the old store. If it’s in your family album, it belongs here.
Every edition of the U.S. Geological Survey’s map of Sugar City. Tap a year, or press play to watch the town change.
1951Moody 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 Sugar City.
Every building
Sugar City, building by building, 1909–1921
Fire insurance maps drew every building, what it was made of and what it was used for, so insurers could price the risk of fire. Pick a year, then a sheet.
In 1903, according to Wikidata. Sugar City’s post office opened in 1950, and the census of 1910 counted 391 people here.
How does Sugar City rank for history?
Sugar City is among the newest 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 Sugar City?
0.3% of Sugar City’s homes were built before 1940 (Census estimate), against a typical 8.5% for an Idaho town; the median home was built in 1997.
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 (6), Wikipedia, 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), the USGS Geographic Names Information System and Sanborn fire insurance maps (Library of Congress). Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.
1976
1976
