| Aich | |
| Pushpin Map: | Germany |
| Pushpin Map Caption: | Location of mouth |
| Source1 Location: | Holzgerlingen |
| Mouth Location: | Neckar in Nürtingen |
| Mouth Coordinates: | 48.65°N 9.33°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Germany |
| Subdivision Type2: | State |
| Subdivision Name2: | Baden-Württemberg |
| Length: | 30.5km (19miles) |
| Mouth Elevation: | above sea level |
| Basin Size: | 179km2 |
| Tributaries Right: | Schaich |
The Aich is a river in Baden-Württemberg, Germany. It is approximately long. It is a left tributary of the Neckar in Nürtingen.
The Aich's origin is in Holzgerlingen. It flows to the north through Neuweiler and then south past Schönaich and Waldenbuch. It then flows through the Schönbuch nature park before passing through Betzenberg. After that, it flows through Aichtal before finally passing through Oberensingen and into the Neckar. The river is home to some species of white fish.