Founding year: the first St. Maries post office (Blevins & Helbock, CC0).The full story ↓
History grade
What drives St. Maries’ History grade
On its age, its old homes and the National Register, St. Maries is more historic than 72% of U.S. towns. Its share of homes from before 1940 holds the grade up; its age pulls it down.
B+
HistoryA character grade: shown, never part of St. Maries’ 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 St. Maries’ 13.7 sits near the middle of its state (60% of Idaho towns have fewer) while its 4 listings outnumber those of 68% of U.S. towns.
How sure. Graded on any two of the three inputs instead, the letter would range from B− to A. The pre-1940 share is a Census survey estimate (±7.2 points). The founding year is the first post office, not a stated founding date.
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 →
What stands out about St. Maries’ past
Read from the archive, the National Register and the record. The page puts what stands out first.
The townsite was selected by Joseph Fisher, just southwest of the confluence of St. Maries River and St. Joe River, to provide a location for a sawmill, first built in 1889. The rivers and lake systems provided rapid transportation systems for floating logs to the mills and utilizing steamboats to transport finished products to market. From the city, the St. Joe River flows west, through several lakes and into the south end of Lake Coeur d'Alene.
The Pacific Extension of the Chicago, Milwaukee, St. Paul and Pacific Railroad (Milwaukee Road) arrived in 1908. The city was established in 1913 when Benewah County was formed from southern Kootenai County. In 1915 St. Maries was named its county seat.
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.
Old hamlets and crossroads still carry their names on the map.
Hamlets and corners on the map
Saint Maries
1cemetery inside St. Maries
Woodlawn
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
Questions about St. Maries’ history
What year was St. Maries founded?
The St. Maries post office opened in 1889, the earliest record of the town by name (U.S. post office records).
How does St. Maries rank for history?
St. Maries is more historic than 72% 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 St. Maries?
4 listings: 3 buildings, among them the Kootenai Inn (listed 1979, the first), and 1 site.
How old are the homes in St. Maries?
32% of St. Maries’ homes were built before 1940 (Census estimate, ±7.2 points), against a typical 8.5% for an Idaho town; the median home was built in 1963.
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 (10), Wikidata (3), the National Register of Historic Places (4), 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) 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.