| Storstrømmen | |
| Max-Depth: | 36m (118feet) |
| Basin Countries: | Denmark |
| Length: | 10km (10miles) |
| Pushpin Map: | Denmark |
| Coordinates: | 54.9667°N 66°W |
| Type: | strait |
Storstrømmen (in Danish pronounced as /ˈstoɐ̯ˌstʁɶmˀm̩/; lit. The Great Stream) is a strait in Denmark separating the island Falster from the island Zealand.
Its maximum depth is approximately and the length is around . Smålandsfarvandet sound is situated to the west and Grønsund lies to the east. Storstrøm Bridge crosses Storstrømmen between the islands of Falster and Masnedø. The southernmost of the Farø Bridges crosses Storstrømmen between Falster and Farø.[1]