The Kizlyar Bay (Russian: Кизлярский залив Kizlyarskiy Zaliv) is a bay of the Caspian Sea located in the Republic of Dagestan, Russian Federation.

The bay cuts 20 km (12 mi) deep into the Dagestan seashore.

[1] The Kuma, Prorva and Talovka rivers discharge into the bay, reducing the salinity to 5 PPT.

The Dagestan Nature Reserve is a protected areacovers the entire area of the gulf, including the island of Morskoy Biryuchok.

The large Sarykum dune, located in another area further to the south, is part of the reserve.