Donaldsonville is a city in Ascension Parish, Louisiana, home to about 6,831 people across 3.8 square miles. Its ZIP code is 70346.
Homes sold for a median of $131 per square foot in the three months ending August 2026, a seller’s market.
Mostly Donaldsonville; also Lemannville and Belle Rose
Each card is that ZIP code’s whole market, including any part outside Donaldsonville. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
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| Nearest major airport | Louis Armstrong New Orleans International Airport (MSY)44 miles away |
|---|---|
| Closer regional airport | Baton Rouge Metropolitan Airport (BTR)31 miles away |
| Nearest city of 250,000+ | New Orleans, LA64 miles away |
| Nearest city of 1 million+ | Houston, TX264 miles away |
Straight-line distances from the center of Donaldsonville; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Donaldsonville had 6,695 residents in the 2020 census, down 12% since 2000.
It’s the 82nd largest of 487 towns in Louisiana by population.
Ascension Parish grew from 24,142 residents in 1900 to 126,500 in 2020.
Ascension Parish, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 91°F in summer, and winter lows average 42°F. About 63.5 inches of rain and melted snow fall in a typical year, with about 0 inches of snow.
Source: NOAA 1991–2020 climate normals, Donaldsonville 4 Sw, LA weather station (3 miles away).
45,262 jobs at 2,626 businesses in Ascension Parish. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
44 doctors and other health care providers list an office in Donaldsonville.
Nearest hospitals
Providers with an office here
| Primary care doctors | 8 |
|---|---|
| Specialist doctors | 1 |
| Dentists | 7 |
| Nurse practitioners and physician assistants | 13 |
| Mental health providers | 6 |
| Physical and occupational therapists | 5 |
| Chiropractors | 4 |
| Pharmacies | 5 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (2 nearby)
Grocery stores (2 nearby)
Pharmacies (1 nearby)
Museums (1 nearby)
Counts are within about 1.5 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Established in 1806.
Notable people born here
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Ascension Parish. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Donaldsonville Primary SchoolDonaldsonville | Pre-K–2 | 371 | Public | 1.5 mi |
| Lowery Elementary SchoolDonaldsonville | 3–5 | 307 | Public | 1.3 mi |
| Lowery Middle SchoolDonaldsonville | 6–8 | 277 | Public | 1.3 mi |
| Donaldsonville High SchoolDonaldsonville | 9–12 | 396 | Public | 0.3 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Ascension Catholic Diocesan Regional SchoolDonaldsonville | Pre-K–12 | 401 | Roman Catholic | 0.7 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Lemannville and Belle Rose.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.