Tuzla Spit or Kosa Tuzla (, ) was a long narrow peninsula or sandy spit in the eastern part of the Strait of Kerch which extended from to the north-west in the direction of the city Kerch for almost .
In 1925, the spit was cut by a storm, forming Tuzla Island. The open-water channel between Tuzla Island and the Russian mainland where the spit had previously existed reached over a kilometer in width.
Tuzla Spit consisted of the Tuzla Island () and two small islands on the Russian side ( and ), and a narrow sand bar connecting them all. The two small islands were re-connected to each other by the 2003 construction by Russia of the 4.1 km long Tuzla dam ().
The Tuzla Spit formed the southern shore of the Taman Bay; the northern shore is the Chushka Spit.
The remnants of the Tuzla Spit were utilized in the building of the Crimean Bridge.