| Image Coa: | DEU Gappenach COA.svg |
| Coordinates: | 50.2739°N 7.3456°W |
| Image Plan: | Gappenach in MYK.png |
| State: | Rheinland-Pfalz |
| District: | Mayen-Koblenz |
| Verbandsgemeinde: | Maifeld |
| Elevation: | 170 |
| Area: | 3.51 |
| Postal Code: | 56294 |
| Area Code: | 02654 |
| Licence: | MYK |
| Gemeindeschlüssel: | 07 1 37 027 |
| Mayor: | Udo Heinemann[1] |
| Leader Term: | 2019 - 24 |
Gappenach is a municipality in the district of Mayen-Koblenz in Rhineland-Palatinate, western Germany.