Geismar, LA ZIP code
The ZIP code for Geismar, Louisiana is 70734. It is in Ascension Parish.
- Population in these ZIPs
- 9,213
- Avg. median income
- $129,000population-weighted
- Typical home value
- $381,000population-weighted
- Metro area
- Baton Rouge, LA
Loading map…
Click anywhere on the map to see which ZIP code it's in.
Geismar, LA ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 70734 | 9,213 | $128,975 | $381,000 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities near Geismar
- Carville 5 mi
- Darrow 5 mi
- Gonzales 6 mi
- Saint Gabriel 7 mi
- Donaldsonville 7 mi
- Prairieville 8 mi
- Sorrento 11 mi
- White Castle 12 mi
- Sunshine 13 mi
- French Settlement 13 mi
- Belle Rose 13 mi
- Convent 14 mi
Frequently asked questions
What is the ZIP code for Geismar, LA?
The ZIP code for Geismar, LA is 70734.
What county is Geismar, Louisiana in?
Geismar ZIP codes are in Ascension Parish.