| Ottmarsfelder Graben | |
| Source1 Location: | between Fiegenstall and Ottmarsfeld |
| Source1 Coordinates: | 49.0803°N 11.0053°W |
| Mouth Location: | before Zollmühle in the Swabian Rezat |
| Mouth Coordinates: | 49.0803°N 10.9686°W |
| Subdivision Type1: | Country |
| Subdivision Type2: | State |
| Length: | 3km (02miles) |
| Tributaries Left: | Schloßgraben |
| Tributaries Right: | Eichgraben |
Ottmarsfelder Graben is a river of Bavaria, Germany.[1] The river is a three kilometer long brook in the Middle Franconian district of Weißenburg-Gunzenhausen. It flows to the west, and joins the Swabian Rezat at Zollmühle, north of Ellingen. Its upper section, upstream from Ottmarsfeld, is also referred to as the Seiserbach.