Ascension Parish, LA ZIP codes
There are 11 ZIP codes in Ascension Parish, LA, in 10 towns, from 70346 to 70778. The largest are 70737 (Gonzales), 70769 (Prairieville) and 70774 (Saint Amant).
The parish seat is Donaldsonville.
- ZIP codes
- 11
- Towns
- 10
- Parish seat
- Donaldsonville
- County FIPS
22005- State
- Louisiana
- Population
- 130,314
- Median household income
- $91,549
- Land area
- 290 sq mi
- Area code
- 225
- Metro area
- Baton Rouge
Ascension Parish ZIP codes by town
- Donaldsonville (parish seat)
- 70346
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
Map of Ascension Parish ZIP codes
The ZIP codes of Ascension Parish, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Ascension Parish in numbers
About 130,314 people live in Ascension Parish, in 47,656 households, the 11th most populous of Louisiana's 64 counties. The median household income is $91,549 a year, 51% above the Louisiana median of $60,756 (US: $80,734). The median owner-occupied home is valued at $279,600 (29% above the Louisiana median), and median gross rent is $1,318 a month. The median age is 36.6; 29.1% of adults 25 and over hold a bachelor's degree or higher (27.0% across Louisiana); the average commute takes 30 minutes.
| Population | 130,314 |
|---|---|
| Households | 47,656 |
| Median age | 36.6 |
| Median household income | $91,549 |
| Median home value | $279,600 |
| Median gross rent | $1,318 |
| Bachelor's degree or higher | 29.1% |
| Mean commute | 30.2 min |
| Population density | 449 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Ascension Parish
| Town | ZIP codes | Population |
|---|---|---|
| Prairieville | 1 | 35,238 |
| Gonzales | 2 | 13,108 |
| Saint Amant | 1 | 10,041 |
| Geismar | 1 | 9,213 |
| Donaldsonville | 1 | 6,831 |
| Sorrento | 1 | 2,203 |
| Darrow | 1 | 183 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Ascension Parish.
Not sure you are in Ascension Parish? What county am I in? answers from your location, near a county line included.
Every ZIP code in Ascension Parish, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
70346 | Donaldsonville , LA | Standard | 9,927 | $35,280 | $176,900 |
70707 | Gonzales , LA | No street area | — | — | — |
70718 | Brittany , LA | No street area | — | — | — |
70725 | Darrow , LA | Standard | 943 | — | $62,200 |
70728 | Duplessis , LA | No street area | — | — | — |
70734 | Geismar , LA | Standard | 9,213 | $128,975 | $344,100 |
70737 | Gonzales , LA | Standard | 49,084 | $82,521 | $261,600 |
70738 | Burnside , LA | No street area | — | — | — |
70769 | Prairieville , LA | Standard | 49,278 | $109,404 | $311,500 |
70774 | Saint Amant , LA | Standard | 10,041 | $102,422 | $256,300 |
70778 | Sorrento , LA | Standard | 2,742 | $101,967 | $253,000 |
Cite this page
zipcodes.pro. “Ascension Parish ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/la/county/ascension
Underlying data is public domain or openly licensed — sources, vintages and licences.