| Place Name | Geismar |
| Place Type | Unincorporated |
| ZIP Code(s) | 70734 |
| County | Ascension Parish |
| Area Code(s) | 225 |
| Timezone | Central Standard Time (CST) |
| Population () | |
| Metro/Micro Stats Area | Baton Rouge, LA |
| US Congressional District(s) | Louisiana 2nd |
| State House Districts | 58 |
| State Senate Districts | 2 |