Koserow is a municipality on Usedom Island, in the Vorpommern-Greifswald district, in Mecklenburg-Vorpommern, Germany.

A small coastal bathing resort, Koserow lies on an isthmus on the island of Usedom on the Baltic Sea, near the border with Poland. It is located within the Usedom Nature Park and is one of the four so-called Amber Spas on the island, connected by a 12 km long fine sandy beach called Amber Beach. The other three amber spas are Loddin, Ückeritz and Zempin.