| Gailbach | |
| Pushpin Map: | Germany#Germany Saarland |
| Source1 Location: | Obergailbach |
| Mouth Location: | Gersheim |
| Mouth Coordinates: | 49.1383°N 7.2°W |
| Subdivision Type1: | Countries |
| Subdivision Name1: | France and Germany |
| Subdivision Type2: | Region |
| Subdivision Name2: | Grand Est |
| Subdivision Type3: | State |
| Subdivision Name3: | Saarland |
| Tributaries Right: | Wallringerbach |
Gailbach is a river of Moselle, France and Saarland, Germany. It flows into the Blies near Niedergailbach. Its course within France is 3.3km (02.1miles) long.