| Image Coa: | DEU Thalmässing COA.svg |
| Coordinates: | 49.0833°N 24°W |
| Image Plan: | Thalmässing in RH.svg |
| State: | Bavaria |
| Region: | Mittelfranken |
| District: | Roth |
| Elevation: | 418 |
| Area: | 80.57 |
| Postal Code: | 91177 |
| Area Code: | 09173 |
| Licence: | RH |
| Gemeindeschlüssel: | 09 5 76 148 |
| Divisions: | 38 districts |
| Website: | www.thalmaessing.de |
| Mayor: | Johannes Mailinger[1] |
| Leader Term: | 2023 - 29 |
| Party: | CSU |
Thalmässing is a municipality in the district of Roth, in Bavaria, Germany.