The purpose of the present paper is to introduce two new classes HSp(α) and HCp(α) of p-harmonic mappings together with their corresponding subclasses HSp^0(α ) and HSp^0(α). We prove that the mappings in HSp(α) and HCp(α) are univalent and sense-preserving in U and obtain extreme points of HSp^0(α) and HSp^0(α), HSp(α)∩Tp and HCp(α)∩Tp are determined, where Tp denotes the set of p-harmonic mapping with non negative coefficients. Finally, we establish the existence of the neighborhoods of mappings in HCp(α). Relevant connections of the results presented here with various known results are briefly indicated.