Jeziorak (German: Geserichsee) is a lake in the Iława Lake District in Warmia-Masuria, Poland.

The maximum depth is 13 metres (43 ft).

It is the longest lake in Poland, and ranks 6th by area.

[1] The lake was formed by filling a glacial tunnel valley.

This article about a location in Warmian-Masurian Voivodeship is a stub.