Abstract: The family Peperaceae, until 1940, was limited to two genera viz. Piper Linn., and Piperomia Ruiz &Pav. In 1883, F.A.W.Miquel subdivide it into several ranks and described about 600 species under 20 different segregate genera. Since then, the family has undergone considerable changes in the circumspection of various taxonomic ranks .In India, 108 species have been reported from two independent centers of distribution. They are 1) the region of Sub-Himalayan and North-Eastern hill ranges and 2) South Deccan. In the present paper an attempt is made, to revise the taxonomy of Piper species occurring in the Karnataka region of Deccan, based on the authors survey of the region under study and collection of over 300 herbarium specimens. In all 8 species have been described. An artificial key for the Karnataka species, field notes, nomenclature notes, comments on affinty, world distributions, distribution in India and in Karnataka and type locality are provided.