Prasanna S. Kumar is an Indian cinematographer who works predominantly in Tamil language films and television.
His cousin is director Sasi and he graduated from a college of arts. During the early stages of his career, he was associated with cinematographer P. G. Muthiah in Poo. After a couple of years working with him, he then moved on to work with R. Rathnavelu in David (2013), Haridas (2013), and ' (2014). He also associated with Ravi K Chandran and worked under G. N. R. Kumaravelan. He made his debut with Pichaikkaran, which was directed by Sasi.