| Type: | Ortsgemeinde |
| Image Coa: | DEU Althornbach COA.svg |
| Coordinates: | 49.1969°N 7.3833°W |
| Image Plan: | Althornbach in PS.svg |
| State: | Rheinland-Pfalz |
| District: | Südwestpfalz |
| Verbandsgemeinde: | Zweibrücken-Land |
| Elevation: | 250 |
| Area: | 5.59 |
| Postal Code: | 66484 |
| Area Code: | 06338 |
| Licence: | PS |
| Gemeindeschlüssel: | 07 3 40 201 |
| Website: | www.gemeinde-althornbach.de |
| Mayor: | Bernd Kipp |
| Leader Term: | 2019 - 24 |
Althornbach is a municipality in Südwestpfalz district, in Rhineland-Palatinate, western Germany.