Langenwerder is a small uninhabited island near the island Poel north of Gollwitz, a district of the municipality of Poel island.

It is approximately 800 metres long, 500 metres wide, and flat.

The island is a nature reserve, due to the birds that live there, and therefore access to the island is not usually allowed.

• www.langenwerder.de Homepage of Langenwerder

54°02′N 11°30′E / 54.033°N 11.500°E / 54.033; 11.500