| Steinagger | |
| Mouth Location: | Agger |
| Mouth Coordinates: | 51.0056°N 7.6247°W |
| Subdivision Type1: | Country |
| Subdivision Type2: | State |
| Length: | 11.4km (07.1miles) |
Steinagger is a river of North Rhine-Westphalia, Germany. It flows into the Agger near Bergneustadt.