Hahnville’s post office opened in 1880, and 2 of its places are on the National Register
More historic than 31% of U.S. towns · #85 of 161 in Louisiana. What drives it
Most of Hahnville was built recently: 0.5% of its homes predate 1940 and the median home dates from 1993. Below: 4 old photos and papers, maps from 1891 on, and the census since 1960.
The Hahnville post office opened in 1880, the earliest record of the town by name. Another post office, Saint Charles (1843), opened inside today’s town and later closed.
First census: 1,297 in 19602020 census: 2,959146 years
How historic is Hahnville?
C
More historic than 31% of U.S. towns, on its age, its old homes and the National Register.
Founding year: the first Hahnville post office (Blevins & Helbock, CC0).The full story ↓
History grade
What drives Hahnville’s History grade
On its age, its old homes and the National Register, Hahnville is more historic than 31% of U.S. towns, #85 of 161 in Louisiana. Its National Register listings hold the grade up; its share of homes from before 1940 pulls it down.
C
HistoryA character grade: shown, never part of Hahnville’s overall grade.
Louisiana towns list more on the Register than most of the country (a typical Louisiana town has 3.8 per 10,000 residents, the U.S. 2.4), so Hahnville’s 11.4 sits above most of its state (68% of Louisiana towns have fewer) while its 4 historic buildings outnumber those of 68% of U.S. towns.
How sure. Graded on any two of the three inputs instead, the letter would range from D to B−. The pre-1940 share (±0.9 points) is firm at this size. 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 Hahnville’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
In 1682, La Salle recorded the presence of a village of Quinipissa peoples in the vicinity of modern-day Hahnville. In the 1700s, German immigrants to the French colony of Louisiana began settling along the Mississippi upriver from New Orleans in what became known as the German Coast. In the early 1800s, following the sale of Louisiana, the United States established the St. Charles Courthouse in the area and a small community grew up around it. In February 1872, Thomas Sharpe began laying out a village near the courthouse, which he called Flaggville after district judge Othelle J. Flagg. Around the same time, former governor Michael Hahn, who had a sugar plantation upriver from Flaggville, began dividing his land to found Hahnville. Gradually "Hahnville" became the commonly accepted name for the larger area.
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.
The Hahnville post office opened in 1880, the earliest record of the town by name (U.S. post office records).
How does Hahnville rank for history?
Hahnville is more historic than 31% of U.S. towns, #85 of 161 in Louisiana. 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 Hahnville?
Two places: the Homeplace Plantation House (listed 1970) and the Odd Fellows Hall (2019).
How old are the homes in Hahnville?
0.5% of Hahnville’s homes were built before 1940 (Census estimate), against a typical 3.4% for a Louisiana town; the median home was built in 1993.
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 (3), the Library of Congress (4), the National Register of Historic Places (2), 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.