In this paper, the most appropriate material for MEMS Disk resonator compatible with CMOS technology is selected using the Ashby approach. Materials indices are formulated based on three primary performance parameters, namely high Q, high resonant frequency, and low process temperature. The selection chart shows that for high Q and high frequency, polySi0.35Ge0.65 is the best possible material for MEMS resonator. The close match between theoretical and experimental findings validates our proposed study. © 2016, Universiti Malaysia Perlis. All rights reserved.