| Image Coa: | DEU Selbach COA.svg |
| Coordinates: | 50.7447°N 7.7681°W |
| Image Plan: | Selbach (Sieg) in AK.svg |
| State: | Rheinland-Pfalz |
| District: | Altenkirchen |
| Verbandsgemeinde: | Wissen |
| Elevation: | 220 |
| Area: | 3.66 |
| Postal Code: | 57537 |
| Area Code: | 02742 |
| Licence: | AK |
| Gemeindeschlüssel: | 07 1 32 105 |
| Mayor: | Matthias Grohs[1] |
| Leader Term: | 2019 - 24 |
| Bürgermeistertitel: | Ortsbürgermeister |
Selbach is a municipality in the district of Altenkirchen, in Rhineland-Palatinate, in western Germany.
The place gave its name to Selbach, Rio Grande do Sul in southern Brazil, where since the pioneering days the Riograndenser Hunsrückisch language, a Brazilian variety of German largely based on the Rhine Franconian is spoken.