Gravois Mills’ post office opened in 1860, and 1 of its places is on the National Register
Most of Gravois Mills was built recently: 7% of its homes predate 1940 and the median home dates from 1985. Its Register listing is the Old St. Patrick's Church. Below: 1 old photo or paper, maps from 1904 on, and the census since 1960.
From Gravois Mills’ archive · credits on each photo
Quick answers
How Gravois Mills began
When was Gravois Mills founded?
1860
The Gravois Mills post office opened in 1860, the earliest record of the town by name. Another post office, Millville (1834), opened inside today’s town and later closed.
First census: 33 in 19602020 census: 129166 years
Founding year: the first Gravois Mills post office (Blevins & Helbock, CC0).The full story ↓
What stands out about Gravois Mills’ past
Read from the archive, the National Register and the record. The page puts what stands out first.
Peaked at 208 in 2000; 129 people lived here in 2020.
7 censuses, 1960–2020.
U.S. Census Bureau decennial counts, from the census table on Gravois Mills’ Wikipedia page.
On the map
Gravois Mills on the map, 1904 to 1981
Every edition of the U.S. Geological Survey’s map of Gravois Mills. Tap a year, or press play to watch the town change.
1904Gravois Mills sheet · 1:62,500
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Gravois Mills.
Gravois Mills was laid out in 1884 and named for a nearby gristmill on Gravois Creek. A post office called Gravois Mills has been in operation since 1860.
Old St. Patrick's Church was listed on the National Register of Historic Places in 1979.
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). How TownRatings grades history →
From the Library of Congress (2), the National Register of Historic Places (1), Wikipedia, 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.