| Ohrtbrookgraben | |
| Mouth Location: | Pinnau |
| Mouth Coordinates: | 53.6729°N 9.7057°W |
| Subdivision Type1: | Country |
| Subdivision Type2: | State |
| Tributaries Right: | Basshornlaufgraben |
Ohrtbrookgraben is a small river of Schleswig-Holstein, Germany. It flows into the Pinnau near Uetersen.[1]