| Image Coa: | DEU Brachbach COA.svg |
| Coordinates: | 50.8175°N 7.9319°W |
| Image Plan: | Brachbach in AK.svg |
| State: | Rheinland-Pfalz |
| District: | Altenkirchen |
| Verbandsgemeinde: | Kirchen (Sieg) |
| Elevation: | 267 |
| Area: | 6.36 |
| Postal Code: | 57555 |
| Area Code: | 02745 |
| Licence: | AK |
| Gemeindeschlüssel: | 07 1 32 012 |
| Website: | Brachbach auf der Website der VG Kirchen |
| Mayor: | Steffen Kappes[1] |
| Leader Term: | 2019 - 24 |
| Bürgermeistertitel: | Ortsbürgermeister |
| Party: | SPD |
Brachbach is a municipality in the district of Altenkirchen, in Rhineland-Palatinate, Germany.