There are around 450 lakes in Azerbaijan. All of them are small in area and volume. There are only 5 lakes with a surface area of more than . Most of these lakes are fresh water, but some of them are salt lakes. Some of these lakes were formed by tectonics, landslides, rivers (oxbow lake), and lagoons. In the mountainous areas, the lakes were formed by tectonics, landslides and glaciers (glacial lake). 