| Image Coa: | DEU Dahlheim COA.svg |
| Coordinates: | 50.2103°N 7.6944°W |
| Image Plan: | Dahlheim in EMS.svg |
| State: | Rheinland-Pfalz |
| District: | Rhein-Lahn-Kreis |
| Verbandsgemeinde: | Loreley |
| Elevation: | 260 |
| Area: | 6.82 |
| Postal Code: | 56348 |
| Area Code: | 06771 |
| Licence: | EMS, DIZ, GOH |
| Gemeindeschlüssel: | 07 1 41 024 |
| Mayor: | Marco Jost[1] |
| Leader Term: | 2019 - 24 |
Dahlheim is a municipality in the district of Rhein-Lahn, in Rhineland-Palatinate, in western Germany.