Polymers are highly sophisticated materials having properties such as being able to be synthesized, easily processed, not to be corroded, light weight and low cost. Polymers are used in many areas of the industry through these properties and these areas are increasing day by day. Contrary to the high potentials and properties of industrial polymers, they lead to pollution due to the fact that they cannot be destroyed by a natural process, and they can only be disposed of as a result of costly fragmentation processes. In addition, their availability from exhaustive sources such as petroleum has led to new quests for continuity and environmental compatibility in the polymer sector. Since industrial polymers have these disadvantages (availability from exhaustive sources and difficult disposal), biopolymers have come to the forefront as alternative materials in many fields, especially in the packaging sector. Biopolymers, which are obtained from natural and sustainable sources, are equivalent to those possessed by industrial polymers through their mechanical and thermal properties. Furthermore, it is predicted that the biopolymers will have an important place in the polymer industry in the following years. In this review study, information about the types of biopolymers has been given and their application areas have been examined according to the sectors.