| Dörnberg | |
| Image Coa: | DEU Dörnberg COA.svg |
| Coordinates: | 50.3257°N 7.8835°W |
| Image Plan: | Dörnberg in EMS.svg |
| State: | Rheinland-Pfalz |
| District: | Rhein-Lahn-Kreis |
| Verbandsgemeinde: | Diez |
| Elevation: | 280 |
| Area: | 5.82 |
| Postal Code: | 56379 (Dörnberg und Hütte) 56377 (Kalkofen) |
| Area Code: | 06439 |
| Licence: | EMS, DIZ, GOH |
| Gemeindeschlüssel: | 07 1 41 030 |
| Divisions: | 3 |
| Website: | doernberg-lahn.de |
| Mayor: | Heiko Hofmann[1] |
| Leader Term: | 2019 - 24 |
Dörnberg is a municipality in the district of Rhein-Lahn, in Rhineland-Palatinate, in western Germany. It belongs to the association community of Diez.