In this paper, the concept of Coding Metasurfaces is presented for RCS reduction. RCS reduction is the predominant parameter in the Defence Applications. Metamaterials have the ability to change the properties of the electromagnetic wave. The two-dimensional versions of the metamaterials are known as metasurfaces. The Polarization Conversion Metasurface has the ability to achieve RCS reduction over a wide bandwidth. The shape of the reflected beam can be changed by different coding schemes of the metasurfaces. By gradually rotating the unit cell, the phase gradient can be achieved which is used to obtain wide RCS reduction bandwidth. In this paper, various Polarization Conversion Metasurfaces are discussed with different coding schemes in order to demonstrate their RCS reduction capabilities. The main novelty of the paper is that it introduces the Coding Metasurfaces and their RCS reduction performance for a plane wave incident at the normal direction and oblique incidence.