| Ahrendsberg | |
| Location: | Baltic Sea |
| Coordinates: | 53.966°N 11.468°W |
| Length Km: | 0.600 |
| Width Km: | 0.220 |
| Area Ha: | 8.6 |
| Country: | Germany |
| Population: | 0 |
Ahrendsberg is an uninhabited island, in area, near the island of Poel in the Breitling, a strait off the Bay of Wismar on the Baltic coast of Germany.
The island, which is roughly long and up to wide, is dominated by salt meadows with marshy islands and shores that are dissected by creeks. The higher areas are generally very dry and are characterised by stunted vegetation, for example dry, lean grassland with thorn bushes. At the southern tip of the island is a short section of cliff.