Poel or Poel Island, is an island in the Baltic Sea. It forms the natural northern and eastern boundaries of the Bay of Wismar on the German coast. The northern coast of the island is also on the south side of the large gulf known as the Bay of Mecklenburg, which Wismar Bay enters into. Insel Poel thus forms on its northern side the unofficial latitude of the northern boundary of the Wismar Bay.
It is close to the cities of Lübeck, Wismar and Schwerin and is part of the Hamburg Metropolitan Region.
Administratively it is a municipality in the Nordwestmecklenburg district. It consists of Kirchdorf and Oertzenhof (the main towns) and the smaller villages of Timmendorf, Wangern, Hinterwangern, Weitendorf, Weitendorf-Hof, Brandenhusen, Neuhof, Seedorf, Niendorf, Schwarzer Busch, Kaltenhof, Fährdorf, Malchow, Vorwerk and Gollwitz. It covers an area of 36.02 km2 (13.91 sq mi) and has 2,873 citizens. Satellite pictures show that most of it is used as farmland. With its good air, clean water, fine beaches and sheltered harbours, it is also popular recreational area. At Timmendorf harbour there are a pilot's station and facilities for yachts and local fishermen. Kirchdorf has a yachting harbour and a boatyard. Wismar Bay is cited by the Encyclopædia Britannica Eleventh Edition (1910-1911) as the finest harbor on the Baltic.
The island's name derives from pole, the Common Slavic word for "flat land" or "field".